Allow symfony 7
This version is already out for a while, so its probably a good idea to allow it as well. I'm not sure if it would make sense to drop support for symfony below 5.4 as those versions no longer receive any updates. Please let me know if I should update the version constraints here.
Adjust the test matrix to also test against PHP 8.3
Update rector to the latest version
A few rules were deprecated and had to be replaced with newer ones, but other than that, nothing much changed.
I made the following changes here:
5.4as those versions no longer receive any updates. Please let me know if I should update the version constraints here.8.3