Merge pull request Exercise#81 from pierres/patch-1

- Support PHP 8.0
- Fix Xdebug coverage

Merge pull request Exercise#77 from bobvandevijver/patch-1

Exercise#76: Allow null input in Twig extension

minor Exercise#74 Minor improvements in README (HeahDude)

This PR was merged into the 3.0.x-dev branch.

Discussion
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Minor improvements in README

Commits
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95ac61e Minor improvements in README

bug Exercise#75 Replace eval by require_once in ForwardCompatTypeExte…

…nsionTrait (l-vo)

This PR was merged into the 2.0 branch.

Discussion
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Replace eval by require_once in ForwardCompatTypeExtensionTrait

When an application use the ForwardCompatTypeExtensionTrait trait with return types, an error is triggered since the Symfony container can't determine and include the file that created the trait:

`Warning: include_once(/var/www/html/vendor/exercise/html-purifier-bundle/src/Form/TypeExtension/ForwardCompatTypeExtensionTrait.php(8) : eval()'d code): failed to open stream: No such file or directory`

This PR aims to fix this issue.

Commits
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98d3456 Replace eval by require_once for ForwardCompatTypeExtensionTrait

Merge pull request Exercise#52 from heahprod/configure-definition

[3.0] Fixed warming up custom configs and added support for custom config definition

Merge pull request Exercise#71 from heahprod/pump-readme

Added badges in README

Merge pull request Exercise#61 from mpiot/fix-symfony-deprecation

Implement static function getExtendedTypes(): iterable in place of getExtendedType

Merge pull request Exercise#62 from mpiot/fix-tree-root-deprecations

Fix Symfony Tree root deprecation (fix Exercise#59)

Merge pull request Exercise#53 from sweoggy/patch-1

Fixed exception when using TextType without purify options

Merge pull request Exercise#55 from alister/patch-1

kernel.cache_warmer & fixing service definition