Create a tag for Symfony 7 support

[dunglas]

Hi,

Would it be possible to create a new tag, at least for runtime/frankenphp-symfony?

Currently, it's not possible to install the package with Symfony 7, and breaks projects relying on FrankenPHP such as Symfony Docker.

Thanks!

[KDederichs]

Maybe, while you're at it it would be nice if you could merge in #155 and #156 as well? :)

[Nyholm]

Working on a release now. Just fixing CI first.

Thank you for the ping

[dunglas]

Thank you!!