ci: Add tests for PHP 8.3 and 8.4

[Chris53897]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (1c1d5f9) to head (33e57c5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##                main      #127   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       140       140           
===========================================
  Files             14        14           
  Lines            383       383           
===========================================
  Hits             383       383           

[ramsey]

Hey, @Chris53897! Thanks for contributing this.

Unfortunately, since I've not been keeping up with things very well, I missed this and made the same change in the main branch earlier today, so this PR currently shows as having 0 lines changed. 😭

I'm going to merge it, nonetheless, so you'll get commit credit as a contributor for it. 😁