Update dependency phpunit/phpunit to v12 #3994

Job	Run time
Static Analysis by Psalm (locked, 8.4, ubuntu-latest)	2m 48s
Run benchmarks (locked, 8.4, ubuntu-latest)	20s
Static Analysis by PHPStan (locked, 8.5, ubuntu-latest)	38s
Mutation tests (locked, 8.4, ubuntu-latest)	26s
Check Demo Scripts (locked, 8.4, ubuntu-latest)	15s
Run benchmarks (locked, 8.4, windows-latest)	57s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	31s
Test Compatibility (locked, 8.4, ubuntu-latest)	20s
Test Compatibility (locked, 8.4, windows-latest)	58s
Static Analysis by PHPStan (locked, 8.4, ubuntu-latest)	11s
Check Coding Standards (locked, 8.4, ubuntu-latest)	25s
PHPUnit tests (lowest, 8.4, windows-latest)	1s
PHPUnit tests (lowest, 8.5, windows-latest)	19s
PHPUnit tests (highest, 8.5, windows-latest)	1m 7s
PHPUnit tests (lowest, 8.3, windows-latest)	16s
PHPUnit tests (locked, 8.3, windows-latest)	1m 47s
PHPUnit tests (lowest, 8.4, ubuntu-latest)	48s
PHPUnit tests (locked, 8.4, ubuntu-latest)	32s
PHPUnit tests (highest, 8.3, ubuntu-latest)	1m 0s
PHPUnit tests (locked, 8.5, ubuntu-latest)	51s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	5s
PHPUnit tests (highest, 8.4, ubuntu-latest)	3s
PHPUnit tests (locked, 8.4, windows-latest)	1s
PHPUnit tests (locked, 8.5, windows-latest)	7s
PHPUnit tests (locked, 8.3, ubuntu-latest)	3m 8s
PHPUnit tests (highest, 8.3, windows-latest)	1m 41s
PHPUnit tests (highest, 8.5, ubuntu-latest)	17s
PHPUnit tests (highest, 8.4, windows-latest)	5s
PHPUnit tests (lowest, 8.5, ubuntu-latest)	5s
Check Backward Compatibility	0s
	20m 2s

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