Add PHP 8.4 and 8.3 to CI test matrix

[parsilver]

Summary

• Adds PHP 8.4 and 8.3 to the GitHub Actions test matrix
• Ensures compatibility testing with the latest PHP versions
• Maintains existing support for PHP 8.2 and 8.1

Test plan

• Verify CI runs successfully on all PHP versions (8.4, 8.3, 8.2, 8.1)
• Confirm tests pass on both Ubuntu and Windows

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.63%. Comparing base (ec33189) to head (00e18c3).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##               main      #27       +/-   ##
=============================================
+ Coverage     36.06%   71.63%   +35.57%     
+ Complexity      155      146        -9     
=============================================
  Files             8       12        +4     
  Lines           610      543       -67     
=============================================
+ Hits            220      389      +169     
+ Misses          390      154      -236     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.