Fix phpstan errors

[didoda]

This fixes some phpstan errors.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.90%. Comparing base (756160e) to head (7abdce7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #31   +/-   ##
=========================================
  Coverage     98.90%   98.90%           
  Complexity      139      139           
=========================================
  Files            12       12           
  Lines           638      638           
=========================================
  Hits            631      631           
  Misses            7        7           

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