Update PHPStan to version 1.11

[AJenbo]

Breaking change: no

Update PHPStan. There where no new issues found, but it still has useful features and will prevent more issues from being introduced.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.31%. Comparing base (433eb24) to head (053469f).

❗ Current head 053469f differs from pull request most recent head bf04c04. Consider uploading reports for the commit bf04c04 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##                3.x    #1156   +/-   ##
=========================================
  Coverage     92.30%   92.31%           
  Complexity     1286     1286           
=========================================
  Files           111      111           
  Lines          3444     3447    +3     
=========================================
+ Hits           3179     3182    +3     
  Misses          265      265           

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