Add symfony 7 support

[VincentLanglet]

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Hi @icanhazstring ; Symfony 7 is now in RC mode.
Some library are trying to add support for it, and adding support to this one would be helpful.

Thanks a lot for your consideration :)

[icanhazstring]

Thanks 🙏🚀

[VincentLanglet]

Hi @icanhazstring Would it be ok to create a new release with SF 7 support ? Thanks

[icanhazstring]

Sure, will probably take a release in the next day or two 👍

[icanhazstring]

Done. Hope everything works :)