Use composer.json for cache key #169

Job	Run time
PHP-Linter (8.3) / linter	13s
Linter / ecmascript-linter	23s
PHP-Linter (8.4) / linter	21s
Linter / style-linter	16s
Linter / yaml-linter	4s
PHP-Linter (8.5) / linter	19s
Linter / json-linter	27s
Unit tests, PHP 8.3, windows-latest	1m 12s
Unit tests, PHP 8.4, ubuntu-latest	27s
Unit tests, PHP 8.3, ubuntu-latest	25s
Unit tests, PHP 8.5, ubuntu-latest	31s
Unit tests, PHP 8.5, windows-latest	1m 0s
Unit tests, PHP 8.4, windows-latest	1m 17s
Quality control	40s
Security checks	27s
Code coverage	16s
Cleanup artifacts	5s
	8m 23s

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