add support for php 8.5 and symfony 8.0

[Bleksak]

Description

Add support for symfony 8.0 and php 8.5, with added test coverage

Fixes #72

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation

[Bleksak]

probably need to replace Xml config with Php one as the xml loader was removed in symfony 8

[Bleksak]

had to fix some tests, probably ready for review

[jeromegamez]

If it makes things easier, you can drop support for Symfony <6.4 and <7.4 so that the composer.json only has ^6.4||^7.4||^8.0, according to the supported Symfony versions at https://symfony.com/releases. I'd skip 7.3 because it's EOL soon enough.

[Bleksak]

okay i had to drop phpunit back to ^10 because 11 and 12 are not supported by php 8.1/8.2, but the tests go through now

[jeromegamez]

The tests don't run for all PHP and Symfony versions:

But I'll deal with this later. Thank you for your contribution, much appreciated!

[jeromegamez]

Released with 5.7.0, thanks again!

[Bleksak]

Thanks for the quick merge and release