Support Symfony 7

[Soimil]

When trying to install it in a Symfony 7 project, I received the following message:

Problem 1
- Root composer.json requires michaeldegroot/doctrine-encrypt-bundle ^5.1 -> satisfiable by michaeldegroot/doctrine-encrypt-bundle[v5.1.0].
- michaeldegroot/doctrine-encrypt-bundle v5.1.0 requires symfony/property-access ^4.1|^5.0|^6.0 -> found symfony/property-access[v4.1.0, ..., v4.4.44, v5.0.0, ..., v5.4.26, v6.0.0, ..., v6.4.0] but it conflicts with your root composer.json require (7.0.*).

[virtualize]

Support for Symfony 7 was added at this community fork a few days ago:
https://github.com/DoctrineEncryptBundle/DoctrineEncryptBundle/releases/tag/5.4.0