Update dependency phpstan/phpstan to ^1.12.7 #2465

Job	Run time
Check Backward Compatibility	0s
Check Coding Standards (locked, 8.2, ubuntu-latest)	21s
Test Compatibility (locked, 8.3, ubuntu-latest)	25s
Run benchmarks (locked, 8.3, ubuntu-latest)	19s
Test Compatibility (locked, 8.3, windows-latest)	53s
Run benchmarks (locked, 8.3, windows-latest)	1m 3s
Check Demo Scripts (locked, 8.3, ubuntu-latest)	13s
Mutation tests (locked, 8.3, ubuntu-latest)	11m 16s
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	36s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	1m 40s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	34s
Static Analysis by Psalm (locked, 8.3, ubuntu-latest)	27s
PHPUnit tests (lowest, 8.2, windows-latest)	2m 29s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	4m 20s
PHPUnit tests (lowest, 8.3, windows-latest)	2m 32s
PHPUnit tests (highest, 8.2, ubuntu-latest)	1m 26s
PHPUnit tests (highest, 8.2, windows-latest)	2m 29s
PHPUnit tests (highest, 8.3, ubuntu-latest)	1m 14s
PHPUnit tests (highest, 8.3, windows-latest)	1m 33s
PHPUnit tests (locked, 8.2, ubuntu-latest)	1m 9s
PHPUnit tests (locked, 8.2, windows-latest)	1m 45s
PHPUnit tests (locked, 8.3, ubuntu-latest)	4m 0s
PHPUnit tests (locked, 8.3, windows-latest)	1m 21s
	42m 5s

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