Update PHPStan to 2.1.31

[staabm]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.82%. Comparing base (ba70759) to head (a33f5e1).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1104   +/-   ##
=========================================
  Coverage     88.82%   88.82%           
  Complexity     1391     1391           
=========================================
  Files            98       98           
  Lines          4652     4652           
=========================================
  Hits           4132     4132           
  Misses          520      520           

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[sebastianbergmann]

Thank you for your contribution. I appreciate the time you invested in preparing this pull request. However, I have decided not to merge it as I just did this in 96939c7 and cf32556.