Clean tests for PHPUnit v.10.

[terabytesoftw]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌
Fixed issues	#57

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.81%. Comparing base (658aa1c) to head (6f88816).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #109   +/-   ##
=========================================
  Coverage     66.81%   66.81%           
  Complexity    11209    11209           
=========================================
  Files           434      434           
  Lines         36536    36536           
=========================================
  Hits          24412    24412           
  Misses        12124    12124           

Flag	Coverage Δ
	17.45% <33.33%> (+<0.01%)	⬆️

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