Update dependency phpstan/phpstan-phpunit to v2 - autoclosed #2557

Job	Run time
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	15s
Static Analysis by Psalm (locked, 8.3, ubuntu-latest)	12s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	12s
Test Compatibility (locked, 8.3, ubuntu-latest)	12s
Mutation tests (locked, 8.3, ubuntu-latest)	12s
Test Compatibility (locked, 8.3, windows-latest)	34s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	11s
Check Backward Compatibility (locked, 8.3, ubuntu-latest)	20s
PHPUnit tests (lowest, 8.2, windows-latest)	34s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	1s
PHPUnit tests (lowest, 8.3, windows-latest)	30s
Run benchmarks (locked, 8.3, ubuntu-latest)	11s
PHPUnit tests (highest, 8.2, ubuntu-latest)	13s
Run benchmarks (locked, 8.3, windows-latest)	31s
PHPUnit tests (highest, 8.2, windows-latest)	36s
PHPUnit tests (highest, 8.3, ubuntu-latest)	16s
PHPUnit tests (highest, 8.3, windows-latest)	34s
Check Coding Standards (locked, 8.2, ubuntu-latest)	16s
PHPUnit tests (locked, 8.2, ubuntu-latest)	17s
Check Demo Scripts (locked, 8.3, ubuntu-latest)	14s
PHPUnit tests (locked, 8.2, windows-latest)	36s
PHPUnit tests (locked, 8.3, ubuntu-latest)	12s
PHPUnit tests (locked, 8.3, windows-latest)	44s
	7m 53s

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