Updated to PHPStan 1.12.2 #2387

Job	Run time
Test Compatibility (locked, 8.3, ubuntu-latest)	22s
Check Backward Compatibility (locked, 8.3, ubuntu-latest)	19s
Check Coding Standards (locked, 8.2, ubuntu-latest)	19s
Test Compatibility (locked, 8.3, windows-latest)	49s
Run benchmarks (locked, 8.3, ubuntu-latest)	22s
Run benchmarks (locked, 8.3, windows-latest)	48s
Check Demo Scripts (locked, 8.3, ubuntu-latest)	18s
Mutation tests (locked, 8.3, ubuntu-latest)	15m 25s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	1m 36s
PHPUnit tests (lowest, 8.2, windows-latest)	2m 22s
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	35s
Static Analysis by Psalm (locked, 8.3, ubuntu-latest)	24s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	1m 13s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	30s
PHPUnit tests (lowest, 8.3, windows-latest)	2m 27s
PHPUnit tests (highest, 8.2, ubuntu-latest)	1m 17s
PHPUnit tests (highest, 8.2, windows-latest)	2m 28s
PHPUnit tests (highest, 8.3, ubuntu-latest)	3m 48s
PHPUnit tests (highest, 8.3, windows-latest)	2m 28s
PHPUnit tests (locked, 8.2, ubuntu-latest)	1m 16s
PHPUnit tests (locked, 8.2, windows-latest)	1m 28s
PHPUnit tests (locked, 8.3, ubuntu-latest)	1m 14s
PHPUnit tests (locked, 8.3, windows-latest)	1m 30s
	43m 18s

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