Raise PHPstan level #358

Job	Run time
Quality control	17s
Security checks	24s
PHP-Linter (8.1) / linter	13s
PHP-Linter (8.2) / linter	17s
PHP-Linter (8.4) / linter	9s
PHP-Linter (8.3) / linter	10s
Linter / yaml-linter	4s
Linter / json-linter	27s
Linter / style-linter	0s
Linter / ecmascript-linter	0s
Unit tests, PHP 8.2, ubuntu-latest	16s
Unit tests, PHP 8.1, ubuntu-latest	14s
Unit tests, PHP 8.3, ubuntu-latest	15s
Unit tests, PHP 8.1, windows-latest	36s
Unit tests, PHP 8.2, windows-latest	45s
Unit tests, PHP 8.3, windows-latest	40s
Unit tests, PHP 8.4, ubuntu-latest	12s
Unit tests, PHP 8.4, windows-latest	40s
Code coverage	6s
Cleanup artifacts	3s
	5m 48s

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