Add PHP 8.2 support, drop PHP 7.4

[Slamdunk]

I admit I've done the minimal effort to get the tests pass because code quality without CSFix & SA tools is a pain.

I'm undecided between answering your change requests with "Ain't nobody got time for that" or "Ok but only with doctrine/coding-standard and psalm at level 6"

[Ocramius]

@Slamdunk I would just make sure we improve what we can, without breaking BC. I've done hundreds of these patches on laminas/: we don't need to refactor anything particular, just the diff lines :)

[Ocramius]

I'll remove the 7.4 pipeline requirement once ready and releasable :+1:

[Ocramius]

Released: https://github.com/phptal/PHPTAL/releases/tag/1.7.0

Thanks @Slamdunk!