chore: add PHP 8.4 to CI [4.5]

[phil-davis]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.65%. Comparing base (d13cf26) to head (41dc45e).
Report is 10 commits behind head on 4.5.

Additional details and impacted files

@@            Coverage Diff            @@
##                4.5     #662   +/-   ##
=========================================
  Coverage     98.65%   98.65%           
- Complexity     1907     1930   +23     
=========================================
  Files            71       71           
  Lines          5294     5294           
=========================================
  Hits           5223     5223           
  Misses           71       71           

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[phil-davis]

This branch has an old version of phpstan that does not seem to find the code that is deprecated in PHP 8.4
The workflow reports plenty of deprecated things as PHP runs, but phpstan does not fail on any of them.
I will do a manual search.

[cedric-anne]

PHPStan compat with PHP 8.4 has been released recently, you should try to update it and see if it works :)

[phil-davis]

Passing now for all supported PHP versions 7.1 to 8.4 so I will merge this.

It does not have the php-cs-fixer nullable_type_declaration rule check that is in master (PR #694 ) because the old php-cs-fixer used here does not do that.

But we do have unit tests running and passing with PHP 8.4 and not reporting any deprecation warnings. So that will be enough for this 4.5 release series.