chore: Update to PHP 8.4 #1339

Job	Run time
Validate composer (8.1, highest)	7s
Linting (8.1)	22s
Linting (8.2)	19s
Linting (8.3)	19s
Linting (8.4)	18s
Check Coding Standards with PHPCS (8.1, highest)	15s
UnitTests with PHPUnit (8.1, highest)	20s
Install dependencies (8.1, lowest, false)	23s
Check for Backward Compatibility breaks (8.1, highest)	18s
UnitTests with PHPUnit (8.2, highest)	20s
Install dependencies (8.1, highest, false)	17s
UnitTests with PHPUnit (8.3, highest)	40s
Install dependencies (8.2, lowest, false)	17s
Static Code Analysis with PHPStan (8.1, locked)	23s
UnitTests with PHPUnit (8.4, highest)	19s
Install dependencies (8.2, highest, false)	22s
Static Code Analysis with PHPStan (8.2, locked)	19s
Install dependencies (8.3, lowest, false)	16s
Static Code Analysis with PHPStan (8.3, locked)	17s
Install dependencies (8.3, highest, false)	15s
Static Code Analysis with PHPStan (8.4, locked)	25s
Install dependencies (8.4, lowest, false)	22s
Install dependencies (8.4, highest, false)	16s
Install dependencies (8.1, locked, false)	20s
Install dependencies (8.2, locked, false)	19s
Install dependencies (8.3, locked, false)	18s
Compare results with PHPUnit (8.1, highest)	17s
Code Coverage with PHPUnit (8.1, highest)	25s
Compare results with PHPUnit (8.2, highest)	18s
Code Coverage with PHPUnit (8.2, highest)	17s
Compare results with PHPUnit (8.3, highest)	17s
Code Coverage with PHPUnit (8.3, highest)	20s
Compare results with PHPUnit (8.4, highest)	16s
Code Coverage with PHPUnit (8.4, highest)	25s
	11m 1s

Provide feedback