Remove unused phpunit/php-file-iterator dependency

[jwpage]

This PR drops the phpunit/php-file-iterator dependency from composer.json, since 11.0 removed the Filter::includeDirectory and Filter::excludeDirectory methods which relied on it.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.21%. Comparing base (a8b58fd) to head (d084030).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1136   +/-   ##
=========================================
  Coverage     88.21%   88.21%           
  Complexity     1398     1398           
=========================================
  Files           105      105           
  Lines          4718     4718           
=========================================
  Hits           4162     4162           
  Misses          556      556           

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[sebastianbergmann]

Good catch, thank you. I cherry-picked this into 11.0 and merged it to 12.5 and main from there.

[staabm]

might be worth setting up https://github.com/shipmonk-rnd/composer-dependency-analyser