Fix: Use Xdebug instead of pcov for collecting code coverage

[localheinz]

This pull request

• uses Xdebug instead of pcov for collecting code coverage

[codecov]

Codecov Report

Merging #432 (3b2e86e) into main (5e02fbb) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #432      +/-   ##
============================================
+ Coverage     98.87%   98.92%   +0.04%     
  Complexity       58       58              
============================================
  Files            14       14              
  Lines           178      186       +8     
============================================
+ Hits            176      184       +8     
  Misses            2        2              

Impacted Files	Coverage Δ
src/Range.php	100.00% <0.00%> (ø)
src/Exception/InvalidUrl.php	100.00% <0.00%> (ø)
src/Exception/InvalidFile.php	100.00% <0.00%> (ø)
src/Exception/InvalidYear.php	100.00% <0.00%> (ø)
src/Exception/InvalidRange.php	100.00% <0.00%> (ø)

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