Bug fixes
[f8fb141] Fixed issues found by SymfonyInsight (@javiereguiluz)
[1cf6d11] Fixed issues found by Php Inspections (EA Ultimate) (@javiereguiluz)
[45d39fa] Fixed some issues found by PHPStan (@javiereguiluz)
[420fa18] Applied PHP-CS-Fixer and enabled the "native_function_invocation" rule (@javiereguiluz)
[c69b96c] Simplified the DesignConfigPass class (@javiereguiluz)
[b826cdf] Simplified the Controller listener (@javiereguiluz)
[2f7c915][b335e5d] Simplified the exception listener (@javiereguiluz)
[c87c591] Simplified some DI classes (@javiereguiluz)
[ea81444] Removed the deprecated getName() method in form types (@javiereguiluz)
[30d4c3c] Removed more deprecated features from earlier Symfony versions (@javiereguiluz)
[aeb14ca] Removed the TreeBuilder deprecation (@javiereguiluz)
[97e5749] Fixed some translation deprecations in tests (@javiereguiluz)
[93d14ee] Removed some deprecations related to templates in tests (@javiereguiluz)