Bump php minimum version & fix deprecations

[nocive]

• fixed several deprecations & slightly modernized the code
• deps: bump php minimum version to 8.1
• deps: bump symfony minimum version to 5.4
• deps: bump twig minimum version to 2.0
• deps: bump php-cs-fixer to 3.16
• update php-cs-fixer configuration

[nocive]

@norberttech perhaps you want to keep composer.lock in git because of renovate bot? It was an unusual sight for me in a library, hence why I removed and gitignored it.

[norberttech]

@norberttech perhaps you want to keep composer.lock in git because of renovate bot? It was an unusual sight for me in a library, hence why I removed and gitignored it.

yeah, dependabot is precisely why I'm keeping composer.lock across all my projects. It helps me identify issues with specific versions after automated upgrades that normally I would not even notice. I would appreciate if you could revert that one change. After that it will be good to merge, amazing work! 🎉

[nocive]

done! thanks, happy I could help ;)

[norberttech]

To keep composer.lock working correctly, you need to locally use PHP 8.1 in order to generate lock in a version that should work across all supported PHP versions.

[norberttech]

To keep composer.lock working correctly, you need to locally use PHP 8.1 in order to generate lock in a version that should work across all supported PHP versions.

oh and you don't need to use --prefer-lowest, just composer update with php 8.1 should work just fine

[nocive]

oof 😅 i think i got it now!

[norberttech]

Nice!! Thank you 🙏

[nocive]

@norberttech I guess documentation updates are still missing in order to release the next version? Would be great to publish it eventually since the last stable is from 2019 💦

[norberttech]

yeah, there are still few more things missing, let me go through this repo an check what would be needed for next stable release, I'm going to create a mileston with issues, once all issues are solved we can release next version.