Upgrade PHPUnit to v13

[rayanlevert]

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (036c850) to head (f9d1e1f).
⚠️ Report is 9 commits behind head on main.
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Additional details and impacted files

@@             Coverage Diff             @@
##                main       #50   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       193       193           
===========================================
  Files              8         8           
  Lines            348       348           
===========================================
  Hits             348       348           

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