Add Symfony 5.2 support

Fixes a situation where, when modifying an entity annotated with @Route, if the parameter being modified was a linked entity, the old_path and new_path properties for the new UrlHistory were the same (the new_path value being the only correct one).

Uses the EngineInterface rather than TwigEngine as typing for the $twig service in the BreadcrumbBuilder.

• Adds some configuration documentation
• In the UrlHistoryWriter event subscriber, a method could be called on null. A condition has been added to check the UrlRef value before attempting to call the setUrl method

Add cache interface to composer.json

Fix meta title placeholder in SeoMetadataType

Thanks @GeneraleCauchemar!

• Fix seo metadata form type default title and description.
• Add prefix and suffix options to seo meta title and description.

Thanks @GeneraleCauchemar for both!

Removed useless format tags in form theme.

Fixed bug breaking the maker bundle.

• More generic translator injection
• Fix events compat with gedmo sluggable