composer_manager 8.x-1.0-alpha8

Last release with the old architecture.

Changes since 8.x-1.0-alpha7:

• #2401933 by penyaskito: Writing public://composer/composer.json permissions not correctly checked
• Improve ComposerFile::read() and ComposerFile::write().
• Stop merging autoload properties, no module should touch those.
• Remove the PHP requirement from our own composer.json, it's irrelevant.
• Rename Packages to PackageController, extend ControllerBase.
• Stop validating package names, that's Composer's job (and our regexp doesn't even match).
• Remove the workaround for grouping packages (symfony/symfony, etc) until/if the actual grouping functionality is resurrected.
• Remove the drush hooks that ran composer update after module install; composer dependencies must be present before install.
• Remove unused and unneeded method.
• Make the module discovery via ExtensionDiscovery work without a bootstrapped Drupal install.
• #2398037: Fix composer rebuild json to remove use of optional modules parameter
• #2397735 by joshtaylor: SchemaIncompleteException: No schema for composer_manager.settings
• Revert "Issue #2345285 by Berdir: Autoloader not a registered during instlalation"
• Remove the symfony_dependency and zendframework_dependency modules which depend on a hook that's been removed.
• #2376785 by bojanz, pcambra: Avoid using moduleHandler for generating the composer.json file
• #2345285 by Berdir: Autoloader not a registered during instlalation
• #2384187 by jbrown: current_path() is replaced by the route
• #2381603 by jbrown: Routes use _controller instead of _content
• #2346843: Remove the composer_manager_update_8000() function
• #2358809 by Arla: Update WATCHDOG_* references
• #2347559 by JulienD, jsacksick: Remove deprecated calls to url() and l()
• #2348351 by graphityx: Cannot use object of type Drupal\\Core\\Form\\FormState as array
• #2346765 by pcambra: Fix typo in registerAutoloader function signature
• #2316473 by bojanz, jbrown: The autoloader is registered too late.
• #2314749 by mradcliffe, pcambra, jbrown: Forms broken due to recent introduction of FormStateInterface
• #2305877 by jbrown: Twig autoescape enabled.
• #2304103 by Berdir: Fixed type hint on ConfigFactoryInterface.