Update dependency vimeo/psalm to v5.15.0 #1387

Job	Run time
Check Coding Standards (locked, 8.2, ubuntu-latest)	20s
Check Backward Compatibility	0s
Test Compatibility (locked, 8.2, ubuntu-latest)	20s
Test Compatibility (locked, 8.2, windows-latest)	42s
Run benchmarks (locked, 8.2, ubuntu-latest)	26s
Run benchmarks (locked, 8.2, windows-latest)	53s
Check Demo Scripts (locked, 8.2, ubuntu-latest)	16s
Mutation tests (locked, 8.2, ubuntu-latest)	17m 49s
PHPUnit tests (lowest, 8.1, ubuntu-latest)	3m 45s
PHPUnit tests (lowest, 8.1, windows-latest)	3m 21s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	1m 49s
PHPUnit tests (lowest, 8.2, windows-latest)	3m 3s
PHPUnit tests (highest, 8.1, ubuntu-latest)	4m 21s
PHPUnit tests (highest, 8.1, windows-latest)	3m 24s
PHPUnit tests (highest, 8.2, ubuntu-latest)	1m 48s
PHPUnit tests (highest, 8.2, windows-latest)	2m 57s
PHPUnit tests (locked, 8.1, ubuntu-latest)	1m 25s
PHPUnit tests (locked, 8.1, windows-latest)	2m 49s
PHPUnit tests (locked, 8.2, ubuntu-latest)	4m 43s
PHPUnit tests (locked, 8.2, windows-latest)	2m 12s
Static Analysis by PHPStan (locked, 8.1, ubuntu-latest)	36s
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	26s
Static Analysis by Psalm (locked, 8.2, ubuntu-latest)	32s
	57m 57s

Provide feedback