Feature/3556 dependency updates and maintenance

[turegjorup]

• Removed support for PHP 8.1 and 8.2
• Changed from Psalm to PHPStan
• Upgrade to PHPUnit 11

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.26%. Comparing base (39a1c8f) to head (aa58300).
Report is 12 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop      #28   +/-   ##
==========================================
  Coverage      74.26%   74.26%           
  Complexity        62       62           
==========================================
  Files              1        1           
  Lines            171      171           
==========================================
  Hits             127      127           
  Misses            44       44           

Flag	Coverage Δ
Unit	74.26% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jekuaitk]

Approved with one suggestion.

[jekuaitk]

If i understand https://www.php.net/manual/en/function.base64-decode.php correctly, base64_decode will never return false unless it is set to strict.

Suggested change

	$decoded = base64_decode(strtr($input, '-_', '+/'));
	/* @phpstan-ignore identical.alwaysFalse */
	$decoded = base64_decode(strtr($input, '-_', '+/'), true);