diff --git a/composer.lock b/composer.lock
index e42d75b760..c72989df1f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,22 +8,22 @@
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@@ -56,20 +56,20 @@
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@@ -152,15 +152,18 @@
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@@ -173,7 +176,7 @@
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@@ -239,35 +242,35 @@
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@@ -997,16 +1001,16 @@
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@@ -1142,22 +1195,22 @@
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-                "symfony/config": "<2.8"
+                "symfony/config": "<2.8",
+                "symfony/dependency-injection": "<3.3",
+                "symfony/yaml": "<3.4"
             },
             "require-dev": {
                 "doctrine/annotations": "~1.0",
                 "doctrine/common": "~2.2",
                 "psr/log": "~1.0",
-                "symfony/config": "~2.8|~3.0",
-                "symfony/expression-language": "~2.8|~3.0",
-                "symfony/http-foundation": "~2.8|~3.0",
-                "symfony/yaml": "~2.8|~3.0"
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.3|~4.0",
+                "symfony/expression-language": "~2.8|~3.0|~4.0",
+                "symfony/http-foundation": "~2.8|~3.0|~4.0",
+                "symfony/yaml": "~3.4|~4.0"
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             "suggest": {
                 "doctrine/annotations": "For using the annotation loader",
@@ -1949,7 +2087,7 @@
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-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
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             "autoload": {
@@ -1982,40 +2120,43 @@
                 "uri",
                 "url"
             ],
-            "time": "2017-04-12T14:13:17+00:00"
+            "time": "2018-01-04T15:09:34+00:00"
         },
         {
             "name": "symfony/serializer",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/serializer.git",
-                "reference": "6eeae1ba82005b761a53b7b8cf960bbf40c95986"
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-                "reference": "6eeae1ba82005b761a53b7b8cf960bbf40c95986",
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             },
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-                "php": ">=5.5.9"
+                "php": "^5.5.9|>=7.0.8"
             },
             "conflict": {
+                "phpdocumentor/type-resolver": "<0.2.1",
+                "symfony/dependency-injection": "<3.2",
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                 "symfony/property-info": "<3.1",
-                "symfony/yaml": "<3.1"
+                "symfony/yaml": "<3.4"
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                 "doctrine/annotations": "~1.0",
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-                "phpdocumentor/reflection-docblock": "~3.0",
-                "symfony/cache": "~3.1",
-                "symfony/config": "~2.8|~3.0",
-                "symfony/http-foundation": "~2.8|~3.0",
-                "symfony/property-access": "~2.8|~3.0",
-                "symfony/property-info": "~3.1",
-                "symfony/yaml": "~3.1"
+                "phpdocumentor/reflection-docblock": "^3.0|^4.0",
+                "symfony/cache": "~3.1|~4.0",
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.2|~4.0",
+                "symfony/http-foundation": "~2.8|~3.0|~4.0",
+                "symfony/property-access": "~2.8|~3.0|~4.0",
+                "symfony/property-info": "~3.1|~4.0",
+                "symfony/yaml": "~3.4|~4.0"
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             "suggest": {
                 "doctrine/annotations": "For using the annotation mapping. You will also need doctrine/cache.",
@@ -2030,7 +2171,7 @@
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
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             },
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@@ -2057,34 +2198,38 @@
             ],
             "description": "Symfony Serializer Component",
             "homepage": "https://symfony.com",
-            "time": "2017-05-01T14:55:58+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "symfony/translation",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "f4a04d2df710f81515df576b2de06bdeee518b83"
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-                "reference": "f4a04d2df710f81515df576b2de06bdeee518b83",
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             },
             "require": {
-                "php": ">=5.5.9",
+                "php": "^5.5.9|>=7.0.8",
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             },
             "conflict": {
-                "symfony/config": "<2.8"
+                "symfony/config": "<2.8",
+                "symfony/dependency-injection": "<3.4",
+                "symfony/yaml": "<3.4"
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~2.8|~3.0",
-                "symfony/intl": "^2.8.18|^3.2.5",
-                "symfony/yaml": "~2.8|~3.0"
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.4|~4.0",
+                "symfony/finder": "~2.8|~3.0|~4.0",
+                "symfony/intl": "^2.8.18|^3.2.5|~4.0",
+                "symfony/yaml": "~3.4|~4.0"
             },
             "suggest": {
                 "psr/log": "To use logging capability in translator",
@@ -2094,7 +2239,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
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             },
             "autoload": {
@@ -2121,40 +2266,47 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2017-04-12T14:13:17+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "symfony/validator",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
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                 "url": "https://github.com/symfony/validator.git",
-                "reference": "98bf011bf1f3b69bece3b79e19633e9c51545b2b"
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-                "reference": "98bf011bf1f3b69bece3b79e19633e9c51545b2b",
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             "require": {
-                "php": ">=5.5.9",
+                "php": "^5.5.9|>=7.0.8",
                 "symfony/polyfill-mbstring": "~1.0",
-                "symfony/translation": "~2.8|~3.0"
+                "symfony/translation": "~2.8|~3.0|~4.0"
             },
             "conflict": {
-                "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"
+                "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0",
+                "symfony/dependency-injection": "<3.3",
+                "symfony/http-kernel": "<3.3.5",
+                "symfony/yaml": "<3.4"
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                 "doctrine/cache": "~1.0",
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-                "symfony/cache": "~3.1",
-                "symfony/config": "~2.8|~3.0",
-                "symfony/expression-language": "~2.8|~3.0",
-                "symfony/http-foundation": "~2.8|~3.0",
-                "symfony/intl": "^2.8.18|^3.2.5",
-                "symfony/yaml": "~2.8|~3.0"
+                "symfony/cache": "~3.1|~4.0",
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.3|~4.0",
+                "symfony/expression-language": "~2.8|~3.0|~4.0",
+                "symfony/http-foundation": "~2.8|~3.0|~4.0",
+                "symfony/http-kernel": "^3.3.5|~4.0",
+                "symfony/intl": "^2.8.18|^3.2.5|~4.0",
+                "symfony/property-access": "~2.8|~3.0|~4.0",
+                "symfony/var-dumper": "~3.3|~4.0",
+                "symfony/yaml": "~3.4|~4.0"
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             "suggest": {
                 "doctrine/annotations": "For using the annotation mapping. You will also need doctrine/cache.",
@@ -2165,13 +2317,13 @@
                 "symfony/expression-language": "For using the Expression validator",
                 "symfony/http-foundation": "",
                 "symfony/intl": "",
-                "symfony/property-access": "For using the Expression validator",
+                "symfony/property-access": "For accessing properties within comparison constraints",
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             },
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
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             "autoload": {
@@ -2198,27 +2350,30 @@
             ],
             "description": "Symfony Validator Component",
             "homepage": "https://symfony.com",
-            "time": "2017-04-12T14:13:17+00:00"
+            "time": "2018-01-03T17:14:19+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "acec26fcf7f3031e094e910b94b002fa53d4e4d6"
+                "reference": "25c192f25721a74084272671f658797d9e0e0146"
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-                "reference": "acec26fcf7f3031e094e910b94b002fa53d4e4d6",
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             },
             "require": {
-                "php": ">=5.5.9"
+                "php": "^5.5.9|>=7.0.8"
+            },
+            "conflict": {
+                "symfony/console": "<3.4"
             },
             "require-dev": {
-                "symfony/console": "~2.8|~3.0"
+                "symfony/console": "~3.4|~4.0"
             },
             "suggest": {
                 "symfony/console": "For validating YAML files using the lint command"
@@ -2226,7 +2381,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2253,7 +2408,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2017-05-01T14:55:58+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "twig/twig",
@@ -2371,21 +2526,21 @@
         },
         {
             "name": "zendframework/zend-diactoros",
-            "version": "1.4.1",
+            "version": "1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-diactoros.git",
-                "reference": "424a840dc3bedcdeea510b42e056c77c2d6c4bef"
+                "reference": "ed6ce7e2105c400ca10277643a8327957c0384b7"
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-                "reference": "424a840dc3bedcdeea510b42e056c77c2d6c4bef",
+                "url": "https://api.github.com/repos/zendframework/zend-diactoros/zipball/ed6ce7e2105c400ca10277643a8327957c0384b7",
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             },
             "require": {
-                "php": "^5.4 || ^7.0",
-                "psr/http-message": "~1.0"
+                "php": "^5.6 || ^7.0",
+                "psr/http-message": "^1.0"
             },
             "provide": {
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@@ -2393,14 +2548,14 @@
             "require-dev": {
                 "ext-dom": "*",
                 "ext-libxml": "*",
-                "phpunit/phpunit": "^4.6 || ^5.5",
-                "zendframework/zend-coding-standard": "~1.0.0"
+                "phpunit/phpunit": "^5.7.16 || ^6.0.8",
+                "zendframework/zend-coding-standard": "~1.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4-dev",
-                    "dev-develop": "1.5-dev"
+                    "dev-master": "1.7.x-dev",
+                    "dev-develop": "1.8.x-dev"
                 }
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             "autoload": {
@@ -2419,7 +2574,7 @@
                 "psr",
                 "psr-7"
             ],
-            "time": "2017-08-17T21:21:00+00:00"
+            "time": "2018-01-04T18:21:48+00:00"
         },
         {
             "name": "zendframework/zend-escaper",
@@ -2467,46 +2622,46 @@
         },
         {
             "name": "zendframework/zend-feed",
-            "version": "2.7.0",
+            "version": "2.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-feed.git",
-                "reference": "12b328d382aa5200f1de53d4147033b885776b67"
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-                "reference": "12b328d382aa5200f1de53d4147033b885776b67",
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+                "reference": "abe88686124d492e0a2a84656f15e5482bfbe030",
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-                "php": "^5.5 || ^7.0",
-                "zendframework/zend-escaper": "^2.5",
-                "zendframework/zend-stdlib": "^2.7 || ^3.0"
+                "php": "^5.6 || ^7.0",
+                "zendframework/zend-escaper": "^2.5.2",
+                "zendframework/zend-stdlib": "^2.7.7 || ^3.1"
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-                "fabpot/php-cs-fixer": "1.7.*",
-                "phpunit/phpunit": "~4.0",
-                "psr/http-message": "^1.0",
-                "zendframework/zend-cache": "^2.5",
-                "zendframework/zend-db": "^2.5",
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-                "zendframework/zend-servicemanager": "^2.7.5 || ^3.0.3",
-                "zendframework/zend-validator": "^2.5"
+                "phpunit/phpunit": "^5.7.23 || ^6.4.3",
+                "psr/http-message": "^1.0.1",
+                "zendframework/zend-cache": "^2.7.2",
+                "zendframework/zend-coding-standard": "~1.0.0",
+                "zendframework/zend-db": "^2.8.2",
+                "zendframework/zend-http": "^2.7",
+                "zendframework/zend-servicemanager": "^2.7.8 || ^3.3",
+                "zendframework/zend-validator": "^2.10.1"
             },
             "suggest": {
-                "psr/http-message": "PSR-7 ^1.0, if you wish to use Zend\\Feed\\Reader\\Http\\Psr7ResponseDecorator",
+                "psr/http-message": "PSR-7 ^1.0.1, if you wish to use Zend\\Feed\\Reader\\Http\\Psr7ResponseDecorator",
                 "zendframework/zend-cache": "Zend\\Cache component, for optionally caching feeds between requests",
                 "zendframework/zend-db": "Zend\\Db component, for use with PubSubHubbub",
                 "zendframework/zend-http": "Zend\\Http for PubSubHubbub, and optionally for use with Zend\\Feed\\Reader",
                 "zendframework/zend-servicemanager": "Zend\\ServiceManager component, for easily extending ExtensionManager implementations",
-                "zendframework/zend-validator": "Zend\\Validator component, for validating email addresses used in Atom feeds and entries ehen using the Writer subcomponent"
+                "zendframework/zend-validator": "Zend\\Validator component, for validating email addresses used in Atom feeds and entries when using the Writer subcomponent"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.7-dev",
-                    "dev-develop": "2.8-dev"
+                    "dev-master": "2.9-dev",
+                    "dev-develop": "2.10-dev"
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             "autoload": {
@@ -2519,40 +2674,40 @@
                 "BSD-3-Clause"
             ],
             "description": "provides functionality for consuming RSS and Atom feeds",
-            "homepage": "https://github.com/zendframework/zend-feed",
             "keywords": [
+                "ZendFramework",
                 "feed",
-                "zf2"
+                "zf"
             ],
-            "time": "2016-02-11T18:54:29+00:00"
+            "time": "2017-12-04T17:59:38+00:00"
         },
         {
             "name": "zendframework/zend-stdlib",
-            "version": "3.0.1",
+            "version": "3.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-stdlib.git",
-                "reference": "8bafa58574204bdff03c275d1d618aaa601588ae"
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-                "reference": "8bafa58574204bdff03c275d1d618aaa601588ae",
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             },
             "require": {
-                "php": "^5.5 || ^7.0"
+                "php": "^5.6 || ^7.0"
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             "require-dev": {
                 "athletic/athletic": "~0.1",
-                "fabpot/php-cs-fixer": "1.7.*",
-                "phpunit/phpunit": "~4.0"
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "^2.6.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.0-dev",
-                    "dev-develop": "3.1-dev"
+                    "dev-master": "3.1-dev",
+                    "dev-develop": "3.2-dev"
                 }
             },
             "autoload": {
@@ -2569,7 +2724,7 @@
                 "stdlib",
                 "zf2"
             ],
-            "time": "2016-04-12T21:19:36+00:00"
+            "time": "2016-09-13T14:38:50+00:00"
         }
     ],
     "packages-dev": [
@@ -2579,20 +2734,20 @@
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                 "type": "git",
                 "url": "https://github.com/minkphp/Mink.git",
-                "reference": "9ea1cebe3dc529ba3861d87c818f045362c40484"
+                "reference": "04ab7af68536ac2c80fd6c08a6fd3620d3409891"
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-                "reference": "9ea1cebe3dc529ba3861d87c818f045362c40484",
+                "url": "https://api.github.com/repos/minkphp/Mink/zipball/04ab7af68536ac2c80fd6c08a6fd3620d3409891",
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             },
             "require": {
                 "php": ">=5.3.1",
-                "symfony/css-selector": "~2.1|~3.0"
+                "symfony/css-selector": "^2.7|^3.0|^4.0"
             },
             "require-dev": {
-                "symfony/phpunit-bridge": "~2.7|~3.0"
+                "symfony/phpunit-bridge": "^3.3|^4.0"
             },
             "suggest": {
                 "behat/mink-browserkit-driver": "extremely fast headless driver for Symfony\\Kernel-based apps (Sf2, Silex)",
@@ -2629,7 +2784,7 @@
                 "testing",
                 "web"
             ],
-            "time": "2017-02-06T09:59:54+00:00"
+            "time": "2018-01-07T17:25:05+00:00"
         },
         {
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+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "time": "2017-08-03T12:35:26+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29T09:07:27+00:00"
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "1.0.5",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7"
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
-                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.4"
+                "phpunit/phpunit": "^6.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "3.0.x-dev"
                 }
             },
             "autoload": {
@@ -3902,23 +4430,73 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2016-10-03T07:41:43+00:00"
+            "time": "2017-03-03T06:23:57+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2015-07-28T20:34:47+00:00"
         },
         {
             "name": "sebastian/version",
-            "version": "1.0.6",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6"
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
                 "shasum": ""
             },
+            "require": {
+                "php": ">=5.6"
+            },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
             "autoload": {
                 "classmap": [
                     "src/"
@@ -3937,20 +4515,20 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21T13:59:46+00:00"
+            "time": "2016-10-03T07:35:21+00:00"
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "2.8.1",
+            "version": "2.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d"
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d",
-                "reference": "d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/dcbed1074f8244661eecddfc2a675430d8d33f62",
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62",
                 "shasum": ""
             },
             "require": {
@@ -4015,29 +4593,29 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2017-03-01T22:17:45+00:00"
+            "time": "2017-05-22T02:43:20+00:00"
         },
         {
             "name": "symfony/browser-kit",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/browser-kit.git",
-                "reference": "9fab1ab6f77b77f3df5fc5250fc6956811699b57"
+                "reference": "490f27762705c8489bd042fe3e9377a191dba9b4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/browser-kit/zipball/9fab1ab6f77b77f3df5fc5250fc6956811699b57",
-                "reference": "9fab1ab6f77b77f3df5fc5250fc6956811699b57",
+                "url": "https://api.github.com/repos/symfony/browser-kit/zipball/490f27762705c8489bd042fe3e9377a191dba9b4",
+                "reference": "490f27762705c8489bd042fe3e9377a191dba9b4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.9",
-                "symfony/dom-crawler": "~2.8|~3.0"
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/dom-crawler": "~2.8|~3.0|~4.0"
             },
             "require-dev": {
-                "symfony/css-selector": "~2.8|~3.0",
-                "symfony/process": "~2.8|~3.0"
+                "symfony/css-selector": "~2.8|~3.0|~4.0",
+                "symfony/process": "~2.8|~3.0|~4.0"
             },
             "suggest": {
                 "symfony/process": ""
@@ -4045,7 +4623,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -4072,29 +4650,29 @@
             ],
             "description": "Symfony BrowserKit Component",
             "homepage": "https://symfony.com",
-            "time": "2017-04-12T14:13:17+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "symfony/css-selector",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/css-selector.git",
-                "reference": "02983c144038e697c959e6b06ef6666de759ccbc"
+                "reference": "e66394bc7610e69279bfdb3ab11b4fe65403f556"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/css-selector/zipball/02983c144038e697c959e6b06ef6666de759ccbc",
-                "reference": "02983c144038e697c959e6b06ef6666de759ccbc",
+                "url": "https://api.github.com/repos/symfony/css-selector/zipball/e66394bc7610e69279bfdb3ab11b4fe65403f556",
+                "reference": "e66394bc7610e69279bfdb3ab11b4fe65403f556",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.9"
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -4125,28 +4703,28 @@
             ],
             "description": "Symfony CssSelector Component",
             "homepage": "https://symfony.com",
-            "time": "2017-05-01T14:55:58+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "symfony/dom-crawler",
-            "version": "v3.2.8",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dom-crawler.git",
-                "reference": "f1ad34e8af09ed17570e027cf0c58a12eddec286"
+                "reference": "09bd97b844b3151fab82f2fdd62db9c464b3910a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/f1ad34e8af09ed17570e027cf0c58a12eddec286",
-                "reference": "f1ad34e8af09ed17570e027cf0c58a12eddec286",
+                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/09bd97b844b3151fab82f2fdd62db9c464b3910a",
+                "reference": "09bd97b844b3151fab82f2fdd62db9c464b3910a",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.9",
+                "php": "^5.5.9|>=7.0.8",
                 "symfony/polyfill-mbstring": "~1.0"
             },
             "require-dev": {
-                "symfony/css-selector": "~2.8|~3.0"
+                "symfony/css-selector": "~2.8|~3.0|~4.0"
             },
             "suggest": {
                 "symfony/css-selector": ""
@@ -4154,7 +4732,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -4181,7 +4759,7 @@
             ],
             "description": "Symfony DomCrawler Component",
             "homepage": "https://symfony.com",
-            "time": "2017-04-12T14:13:17+00:00"
+            "time": "2018-01-03T07:37:34+00:00"
         },
         {
             "name": "symfony/phpunit-bridge",
@@ -4248,6 +4826,96 @@
             "description": "Symfony PHPUnit Bridge",
             "homepage": "https://symfony.com",
             "time": "2018-01-04T17:19:23+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "2db61e59ff05fe5126d152bd0655c9ea113e550f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/2db61e59ff05fe5126d152bd0655c9ea113e550f",
+                "reference": "2db61e59ff05fe5126d152bd0655c9ea113e550f",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2016-11-23T20:04:58+00:00"
         }
     ],
     "aliases": [],
@@ -4258,7 +4926,7 @@
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5.9"
+        "php": "^5.5.9|>=7.0.8"
     },
     "platform-dev": []
 }
diff --git a/core/composer.json b/core/composer.json
index aeb15b4d4d..2e1b1c29dd 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -4,20 +4,20 @@
     "type": "drupal-core",
     "license": "GPL-2.0+",
     "require": {
-        "php": ">=5.5.9",
-        "symfony/class-loader": "~3.2.8",
-        "symfony/console": "~3.2.8",
-        "symfony/dependency-injection": "~3.2.8",
-        "symfony/event-dispatcher": "~3.2.8",
-        "symfony/http-foundation": "~3.2.8",
-        "symfony/http-kernel": "~3.2.8",
-        "symfony/routing": "~3.2.8",
-        "symfony/serializer": "~3.2.8",
-        "symfony/translation": "~3.2.8",
-        "symfony/validator": "~3.2.8",
-        "symfony/process": "~3.2.8",
+        "php": "^5.5.9|>=7.0.8",
+        "symfony/class-loader": "~3.4.0",
+        "symfony/console": "~3.4.0",
+        "symfony/dependency-injection": "~3.4.0",
+        "symfony/event-dispatcher": "~3.4.0",
+        "symfony/http-foundation": "~3.4.0",
+        "symfony/http-kernel": "~3.4.0",
+        "symfony/routing": "~3.4.0",
+        "symfony/serializer": "~3.4.0",
+        "symfony/translation": "~3.4.0",
+        "symfony/validator": "~3.4.0",
+        "symfony/process": "~3.4.0",
         "symfony/polyfill-iconv": "^1.0",
-        "symfony/yaml": "~3.2.8",
+        "symfony/yaml": "~3.4.0",
         "twig/twig": "^1.35.0",
         "doctrine/common": "^2.5",
         "doctrine/annotations": "^1.2",
@@ -46,8 +46,9 @@
         "mikey179/vfsStream": "^1.2",
         "phpunit/phpunit": "^4.8.35 || ^6.1",
         "phpspec/prophecy": "^1.4",
-        "symfony/css-selector": "~3.2.8",
-        "symfony/phpunit-bridge": "^3.4.3"
+        "symfony/css-selector": "^3.4.0",
+        "symfony/phpunit-bridge": "^3.4.3",
+        "symfony/debug": "^3.4.0"
     },
     "replace": {
         "drupal/action": "self.version",
diff --git a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
index a23f333a0a..8b73b9a1d1 100644
--- a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
+++ b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
@@ -104,8 +104,11 @@ public function dispatch($event_name, Event $event = NULL) {
           if (!isset($definition['callable'])) {
             $definition['callable'] = [$this->container->get($definition['service'][0]), $definition['service'][1]];
           }
+          if (is_array($definition['callable']) && isset($definition['callable'][0]) && $definition['callable'][0] instanceof \Closure) {
+            $definition['callable'][0] = $definition['callable'][0]();
+          }
 
-          $definition['callable']($event, $event_name, $this);
+          call_user_func($definition['callable'], $event, $event_name, $this);
           if ($event->isPropagationStopped()) {
             return $event;
           }
@@ -144,6 +147,9 @@ public function getListeners($event_name = NULL) {
           if (!isset($definition['callable'])) {
             $definition['callable'] = [$this->container->get($definition['service'][0]), $definition['service'][1]];
           }
+          if (is_array($definition['callable']) && isset($definition['callable'][0]) && $definition['callable'][0] instanceof \Closure) {
+            $definition['callable'][0] = $definition['callable'][0]();
+          }
 
           $result[] = $definition['callable'];
         }
@@ -156,27 +162,29 @@ public function getListeners($event_name = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function getListenerPriority($eventName, $listener) {
-    // Parts copied from \Symfony\Component\EventDispatcher, that's why you see
-    // a yoda condition here.
-    if (!isset($this->listeners[$eventName])) {
+  public function getListenerPriority($event_name, $listener) {
+    if (!isset($this->listeners[$event_name])) {
       return;
     }
-    foreach ($this->listeners[$eventName] as $priority => $listeners) {
-      if (FALSE !== ($key = array_search(['callable' => $listener], $listeners, TRUE))) {
-        return $priority;
-      }
+    if (is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure) {
+      $listener[0] = $listener[0]();
     }
     // Resolve service definitions if the listener has not been found so far.
-    foreach ($this->listeners[$eventName] as $priority => &$definitions) {
+    foreach ($this->listeners[$event_name] as $priority => &$definitions) {
       foreach ($definitions as $key => &$definition) {
         if (!isset($definition['callable'])) {
           // Once the callable is retrieved we keep it for subsequent method
           // invocations on this class.
-          $definition['callable'] = [$this->container->get($definition['service'][0]), $definition['service'][1]];
-          if ($definition['callable'] === $listener) {
-            return $priority;
-          }
+          $definition['callable'] = [
+            $this->container->get($definition['service'][0]),
+            $definition['service'][1],
+          ];
+        }
+        if (is_array($definition['callable']) && isset($definition['callable'][0]) && $definition['callable'][0] instanceof \Closure) {
+          $definition['callable'][0] = $definition['callable'][0]();
+        }
+        if ($definition['callable'] === $listener) {
+          return $priority;
         }
       }
     }
@@ -186,7 +194,32 @@ public function getListenerPriority($eventName, $listener) {
    * {@inheritdoc}
    */
   public function hasListeners($event_name = NULL) {
-    return (bool) count($this->getListeners($event_name));
+    if ($event_name !== NULL) {
+      if (empty($this->listeners[$event_name])) {
+        return FALSE;
+      }
+      else {
+        foreach ($this->listeners[$event_name] as $priority => $listeners) {
+          if (!empty($listeners)) {
+            return TRUE;
+          }
+        }
+        return FALSE;
+      }
+    }
+    if (!empty($this->listeners)) {
+      foreach ($this->listeners as $event_name => $event_listeners) {
+        if (!empty($event_listeners)) {
+          foreach ($event_listeners as $priority => $listeners) {
+            if (!empty($listeners)) {
+              return TRUE;
+            }
+          }
+        }
+        return FALSE;
+      }
+    }
+    return FALSE;
   }
 
   /**
@@ -214,6 +247,13 @@ public function removeListener($event_name, $listener) {
           $definition['callable'] = [$this->container->get($definition['service'][0]), $definition['service'][1]];
         }
 
+        if (is_array($definition['callable']) && isset($definition['callable'][0]) && $definition['callable'][0] instanceof \Closure && !$listener instanceof \Closure) {
+          $definition['callable'][0] = $definition['callable'][0]();
+        }
+
+        if (is_array($definition['callable']) && isset($definition['callable'][0]) && !$definition['callable'][0] instanceof \Closure && is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure) {
+          $listener[0] = $listener[0]();
+        }
         if ($definition['callable'] === $listener) {
           unset($this->listeners[$event_name][$priority][$key]);
         }
diff --git a/core/lib/Drupal/Component/Serialization/YamlSymfony.php b/core/lib/Drupal/Component/Serialization/YamlSymfony.php
index d35e09cd48..efe3039df7 100644
--- a/core/lib/Drupal/Component/Serialization/YamlSymfony.php
+++ b/core/lib/Drupal/Component/Serialization/YamlSymfony.php
@@ -34,7 +34,7 @@ public static function decode($raw) {
       $yaml = new Parser();
       // Make sure we have a single trailing newline. A very simple config like
       // 'foo: bar' with no newline will fail to parse otherwise.
-      return $yaml->parse($raw, SymfonyYaml::PARSE_EXCEPTION_ON_INVALID_TYPE);
+      return $yaml->parse($raw, SymfonyYaml::PARSE_EXCEPTION_ON_INVALID_TYPE | SymfonyYaml::PARSE_KEYS_AS_STRINGS);
     }
     catch (\Exception $e) {
       throw new InvalidDataTypeException($e->getMessage(), $e->getCode(), $e);
diff --git a/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php b/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
index e3e4895efe..cf4cd89cb5 100644
--- a/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
+++ b/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
@@ -59,23 +59,23 @@ public static function setSettingsOnRequest(Request $request, Settings $settings
     // Initialize proxy settings.
     if ($settings->get('reverse_proxy', FALSE)) {
       $ip_header = $settings->get('reverse_proxy_header', 'X_FORWARDED_FOR');
-      $request::setTrustedHeaderName($request::HEADER_CLIENT_IP, $ip_header);
+      $request::setTrustedHeaderName($request::HEADER_X_FORWARDED_FOR, $ip_header);
 
       $proto_header = $settings->get('reverse_proxy_proto_header', 'X_FORWARDED_PROTO');
-      $request::setTrustedHeaderName($request::HEADER_CLIENT_PROTO, $proto_header);
+      $request::setTrustedHeaderName($request::HEADER_X_FORWARDED_PROTO, $proto_header);
 
       $host_header = $settings->get('reverse_proxy_host_header', 'X_FORWARDED_HOST');
-      $request::setTrustedHeaderName($request::HEADER_CLIENT_HOST, $host_header);
+      $request::setTrustedHeaderName($request::HEADER_X_FORWARDED_HOST, $host_header);
 
       $port_header = $settings->get('reverse_proxy_port_header', 'X_FORWARDED_PORT');
-      $request::setTrustedHeaderName($request::HEADER_CLIENT_PORT, $port_header);
+      $request::setTrustedHeaderName($request::HEADER_X_FORWARDED_PORT, $port_header);
 
       $forwarded_header = $settings->get('reverse_proxy_forwarded_header', 'FORWARDED');
       $request::setTrustedHeaderName($request::HEADER_FORWARDED, $forwarded_header);
 
       $proxies = $settings->get('reverse_proxy_addresses', []);
       if (count($proxies) > 0) {
-        $request::setTrustedProxies($proxies);
+        $request::setTrustedProxies($proxies, Request::HEADER_X_FORWARDED_ALL | Request::HEADER_FORWARDED);
       }
     }
   }
diff --git a/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php b/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php
index a750ecaf09..ec573d2786 100644
--- a/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php
+++ b/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php
@@ -23,6 +23,7 @@
  * @see https://github.com/symfony/symfony/pull/12521
  *
  * @group EventDispatcher
+ * @group legacy
  */
 class ContainerAwareEventDispatcherTest extends SymfonyContainerAwareEventDispatcherTest
 {
@@ -193,4 +194,52 @@ public function testGetListenerPriorityWithServices()
         $this->assertSame(5, $actualPriority);
     }
 
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testAddAListenerService() {
+      parent::testAddAListenerService();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testPreventDuplicateListenerService() {
+      parent::testPreventDuplicateListenerService();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testAddASubscriberService() {
+      parent::testAddASubscriberService();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testHasListenersOnLazyLoad() {
+      parent::testHasListenersOnLazyLoad();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testGetListenersOnLazyLoad() {
+      parent::testGetListenersOnLazyLoad();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testRemoveAfterDispatch() {
+      parent::testRemoveAfterDispatch();
+    }
+
+    /**
+     * @expectedDeprecation The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.
+     */
+    public function testRemoveBeforeDispatch() {
+      parent::testRemoveBeforeDispatch();
+    }
  }
diff --git a/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php b/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
index becd7c0221..b653efd1fd 100644
--- a/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
+++ b/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
@@ -12,6 +12,7 @@
 /**
  * @coversDefaultClass \Drupal\Component\Serialization\Yaml
  * @group Serialization
+ * @group legacy
  */
 class YamlTest extends TestCase {
 
@@ -80,6 +81,8 @@ public function testYamlFiles($file) {
    * Ensures that decoding php objects is similar for PECL and Symfony.
    *
    * @requires extension yaml
+   *
+   * @expectedDeprecation Using the unquoted scalar value "!php/object "O:8:\"stdClass\":1:{s:3:\"foo\";s:3:\"bar\";}"" is deprecated since version 3.3 and will be considered as a tagged value in 4.0. You must quote it on line 2.
    */
   public function testObjectSupportDisabled() {
     $object = new \stdClass();
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/ProxyServicesPassTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/ProxyServicesPassTest.php
index aea2524ebf..638bd1512e 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/ProxyServicesPassTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/ProxyServicesPassTest.php
@@ -39,7 +39,7 @@ public function testContainerWithoutLazyServices() {
 
     $this->proxyServicesPass->process($container);
 
-    $this->assertCount(1, $container->getDefinitions());
+    $this->assertCount(2, $container->getDefinitions());
     $this->assertEquals('Drupal\Core\Plugin\CachedDiscoveryClearer', $container->getDefinition('plugin_cache_clearer')->getClass());
   }
 
@@ -53,7 +53,7 @@ public function testContainerWithLazyServices() {
 
     $this->proxyServicesPass->process($container);
 
-    $this->assertCount(2, $container->getDefinitions());
+    $this->assertCount(3, $container->getDefinitions());
 
     $non_proxy_definition = $container->getDefinition('drupal.proxy_original_service.plugin_cache_clearer');
     $this->assertEquals('Drupal\Core\Plugin\CachedDiscoveryClearer', $non_proxy_definition->getClass());
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
index 5fe2b4478c..848c458a75 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
@@ -38,7 +38,7 @@ public function testProcessNoConsumers() {
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
 
-    $this->assertCount(1, $container->getDefinitions());
+    $this->assertCount(2, $container->getDefinitions());
     $this->assertFalse($container->getDefinition('consumer_id')->hasMethodCall('addHandler'));
   }
 
diff --git a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
index b7a784d487..c42ff5c028 100644
--- a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
+++ b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
@@ -47,6 +47,10 @@ public function testNoProxy() {
    * Tests that subscriber sets trusted headers when reverse proxy is set.
    *
    * @dataProvider reverseProxyEnabledProvider
+   *
+   * @group legacy
+   *
+   * @expectedDeprecation The "Symfony\Component\HttpFoundation\Request::setTrustedHeaderName()" method is deprecated since version 3.3 and will be removed in 4.0. Use the $trustedHeaderSet argument of the Request::setTrustedProxies() method instead.
    */
   public function testReverseProxyEnabled($provided_settings) {
     // Enable reverse proxy and add test values.
@@ -87,10 +91,10 @@ protected function trustedHeadersAreSet(Settings $settings) {
     $request = new Request();
 
     $middleware->handle($request);
-    $this->assertSame($settings->get('reverse_proxy_header'), $request->getTrustedHeaderName($request::HEADER_CLIENT_IP));
-    $this->assertSame($settings->get('reverse_proxy_proto_header'), $request->getTrustedHeaderName($request::HEADER_CLIENT_PROTO));
-    $this->assertSame($settings->get('reverse_proxy_host_header'), $request->getTrustedHeaderName($request::HEADER_CLIENT_HOST));
-    $this->assertSame($settings->get('reverse_proxy_port_header'), $request->getTrustedHeaderName($request::HEADER_CLIENT_PORT));
+    $this->assertSame($settings->get('reverse_proxy_header'), $request->getTrustedHeaderName($request::HEADER_X_FORWARDED_FOR));
+    $this->assertSame($settings->get('reverse_proxy_proto_header'), $request->getTrustedHeaderName($request::HEADER_X_FORWARDED_PROTO));
+    $this->assertSame($settings->get('reverse_proxy_host_header'), $request->getTrustedHeaderName($request::HEADER_X_FORWARDED_HOST));
+    $this->assertSame($settings->get('reverse_proxy_port_header'), $request->getTrustedHeaderName($request::HEADER_X_FORWARDED_PORT));
     $this->assertSame($settings->get('reverse_proxy_forwarded_header'), $request->getTrustedHeaderName($request::HEADER_FORWARDED));
     $this->assertSame($settings->get('reverse_proxy_addresses'), $request->getTrustedProxies());
   }
diff --git a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
index 2eecec9756..f4cd28f18a 100644
--- a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
+++ b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
@@ -60,6 +60,12 @@ protected function deprecationEndTest($test, $time) {
    */
   public static function getSkippedDeprecations() {
     return [
+      'Using the unquoted scalar value "!php/object "O:8:\"stdClass\":1:{s:3:\"foo\";s:3:\"bar\";}"" is deprecated since version 3.3 and will be considered as a tagged value in 4.0. You must quote it.',
+      'The Symfony\Component\DependencyInjection\Container::isFrozen() method is deprecated since version 3.3 and will be removed in 4.0. Use the isCompiled() method instead.',
+      'The Symfony\Component\DependencyInjection\DefinitionDecorator class is deprecated since version 3.3 and will be removed in 4.0. Use the Symfony\Component\DependencyInjection\ChildDefinition class instead.',
+      'The Symfony\Component\ClassLoader\ApcClassLoader class is deprecated since version 3.3 and will be removed in 4.0. Use `composer install --apcu-autoloader` instead.',
+      'Using the X-Status-Code header is deprecated since version 3.3 and will be removed in 4.0. Use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent::allowCustomResponseCode() instead.',
+      'The Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher class is deprecated since version 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.',
       'As of 3.1 an Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface is used to resolve arguments. In 4.0 the $argumentResolver becomes the Symfony\Component\HttpKernel\Controller\ArgumentResolver if no other is provided instead of using the $resolver argument.',
       'Symfony\Component\HttpKernel\Controller\ControllerResolver::getArguments is deprecated as of 3.1 and will be removed in 4.0. Implement the Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface and inject it in the HttpKernel instead.',
       'The Twig_Node::getLine method is deprecated since version 1.27 and will be removed in 2.0. Use getTemplateLine() instead.',