chore: Update to PHP 8.4

[Crovitche-1623]

Close #767

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.26%. Comparing base (24d5da8) to head (131b8a1).
Report is 146 commits behind head on 7.5.x.

Additional details and impacted files

@@            Coverage Diff            @@
##              7.5.x     #771   +/-   ##
=========================================
  Coverage     36.26%   36.26%           
  Complexity      286      286           
=========================================
  Files            27       27           
  Lines          1183     1183           
=========================================
  Hits            429      429           
  Misses          754      754           

Flag	Coverage Δ
phpunit	36.26% <ø> (ø)

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[asgrim]

Thanks @Crovitche-1623 !