Add PHP 8.4 support, drop PHP 8.2

[Slamdunk]

• Blocked by PHP 8.4: could not install imap shivammathur/setup-php#866

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.69%. Comparing base (1a6844c) to head (5e435f7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #578      +/-   ##
============================================
+ Coverage     95.17%   95.69%   +0.52%     
+ Complexity      365      363       -2     
============================================
  Files            45       45              
  Lines           932      930       -2     
============================================
+ Hits            887      890       +3     
+ Misses           45       40       -5     

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