advagg 8.x-3.0

Compatible with Drupal core 8.0.x-8.4.x
Installation Instructions:
If a new site just install as normal.
If upgrading from an old install, delete the old module files as some files have been removed/renamed etc. (Not required if using Composer/Drush as they do that automatically prior to upgrading any package). Also make sure to run the database updates (drush updb or update.php).

Pretty major re-factor in the underlying code and methodology, however very similar in terms of actual functionality and user interaction.
Primary differences:

• No longer overrides the core asset handling but instead runs in the middle of that. This has way way better interoperability with other modules.
• Optimizes files individually. Great if you use HTTP/2 Server Push - and improves performance in all cases.
• Supports Brotli compression (smaller file size than Gzip) if the server has Brotli enabled.

Full changeset from 8.x-2.4:

• #2892640 by pminf, NickWilde: CSS optimizers url update does not include base path
• HTML readme generated from the markdown version for convenience.
• Readme updates for all sub-modules
• Standards fixes
• Typo fix
• Readme Updates
• Improve README.md
• Initial implementation of CSS Selector limiter for 8.x-3.x
• Update the asset array with the (possibly) modified array after optimizing the array for both CSS & JS assets.
• Allow subscribers to AssetOptimizationEvents to change the asset array.
• Update tests to removed deprecated asserts (mostly assert[No]Raw)
• Convert simpletest->PHPUnit: CdnTest
• Convert simpletest->PHPUnit: AdminPagesTest and all tests that extend it.
• Convert simpletest->PHPUnit: AdvaggPathManipulationTest
• Convert simpletest->PHPUnit tests: AdvaggTestBase -> AdvaggFunctionalTestBase
• Add .csslintrc to exclude test css files.
• Fix CSS minifier's handling of charset declarations.
• Css minification tests
• Ignore test JS files and included JS files from vendors when linting.
• Standards fixes.
• Don't test JSMin minification if the JSMin extension is unavailable.
• #2888100 by StryKaizer, NickWilde: jsqueeze licensing information is inverted
• Test JsMinifier::optimize() when minifier set to JShrink
• Test JsMinifier::optimize() when minifier set to JSqueeze.
• Test JsMinifier::optimize() when minifier set to JSMinPlus
• Test JsMinifier::optimize() when minifier set to JSMin.
• Test advagg_js_minify JsMinifier::clean()
• Fairly complete testing of the CDN sub module.
• Install functionality for advagg_cdn to clear caches so it just works on install.
• Typo fix in .htaccess generator
• *More* (sigh) improvements for some files that JSMin doesn't deal with nicely.
• Only write files/run compression on the data if the files don't exist.
• Include original file name in cache data for optimized files.
• Extra update function for those updating from 8.x-2.x remove advagg_bundler from db
• Fix: Use correct callback syntax for OO callback in RemoveConsoleLog and TranslateCss
• #2830672 by NickWilde: Can we add a setting to remove console.log in production?
• Ensure optimized filename is unique based on contents. Enables better caching on external servers/browser cache.
• Add option to use SymLinksIfOwnerMatch instead of FollowSymlinks. This works better for some server configurations.
• Ensure regeneration of htaccess files when settings change
• Add option to add the immutable tag to Apache cache tags (true by default).
• Fix: add missing param docblock to SingleAssetOptimizerBase::__construct()
• Add htaccess so that the generated brotli compressed files are served.
• git commit -m 'Issue #2883494 by NickWilde: Inline loadCSS library broken due to Core change'
• Fix: PHP5.6 compatibility: Scalar hints introduce in PHP7x
• basic brotli support for advagg optimized files
• refactor: move js_* config setting to subkeys under js mapping in advagg.schema
• fix: misnamed function in advagg_ext_minify.install (copy-pasta)
• Advagg Validator Module refactored for 8.x-3.x
• Use REQUEST_TIME for now even though it's deprecated to maintain compatibility with D8.0-8.2
• Remove usage of the datetime.time service. It was introduced in 8.3. Everyone *should* be moving to 8.3 but for now advagg will be compatible with 8.0-8.x
• (temporarily) remove advagg_validator submodule. to be refactored but unimportant module so.
• Standards fixes. Just a few.
• remove unused use statement
• remove core_groups options as no longer used. update settings form.
• (re)implement css combine media
• Adjust AssetOptimizer::optimizeFile() to allow it to change the asset array
• remove override of core CssCollectionGrouper
• Update uninstalled functionality
• Remove JsCollectionGrouper override as it causes conflicts with minimal gain.
• Updated readme (could certainly use some more love but it isn't totally inaccurate now)
• Updated hook_requirements()
• Updated Info form
• remove update function that references services that no longer exists
• Updated API/Developer documentation
• comment fix
• Refactor: remove advagg_bundler sub module. It was poorly implemented in 8.x-2.x and better to use mostly core really.
• define advagg logger channel
• Refactored advagg_ext_minify
• a simple gitignore for PHPStorm files.
• Refactored advagg_mod
• advagg_js_minify: typo fix
• move advagg_css_minify migration templates to the right spot
• Refactor advagg_css_minify sub module
• If creating optimized css files in a new location must also update any included relative urls.
• Rename advagg\Asset\AssetOptimizeInterface to advagg\Asset\SingleAssetOptimizerBase It isn't an interface it's an abstract class.
• remove testing function
• Overwrite existing optimized files if need be.
• Refactored advagg_js_minify module
• Convert hook to event for optimizing file contents.
• Update migration. Note: cache_level still exists but has different values.
• advagg_cdn: improve schema label for settings.minified
• refactor drush integrations
• rename service advagg.cache->cache.advagg since otherwise it sometimes messes up.
• refactor (minimal needed) for AdvAgg CDN sub module
• remove unused param in InfoForm::getFileInfoAjax
• refactored Operations form
• re-implemented cron functionality
• Refactored InfoForm
• typo fix in accessing cached prefetch data.
• Remove classes overriding core render attachment processor classes. Implementing functionality through different methods to avoid conflicts. @see Drupal/advagg/EventSubscriber/ResponseSubscriber
• Remove outdated options from settings form. Improve readability and ux of settings form.
• Remove outdated config settings
• Output prefetch link elements in the html head.
• move advagg_drupal_sort_css_js_stable() to AssetOptimizer::sortStable() Used in advagg_mod submodule.
• docstring improvements
• Improve the hook_implements_alter() implementation for current version of advagg
• remove reference to old D7 hook
• Cache DNS prefetch data for local files.
• Alter AssetOptimizer::scanFile to better allow future caching of non-path data.
• Minimal DNS prefetch implementation.
• REQUEST_TIME is deprecated in Drupal 8.3+ replace with TimeInterface
• Basically complete refactor of the core module.
• drupal_alter doesn't exist in any D8 branch and we're using moduleHandler::alter so don't test themes for hooks.
• Remove AssetDumper as it adds no significant value with the refactoring.