Use composer.json for cache key #165

Job	Run time
Quality control	38s
Security checks	25s
PHP-Linter (8.4) / linter	14s
PHP-Linter (8.3) / linter	17s
PHP-Linter (8.5) / linter	12s
Linter / json-linter	24s
Linter / yaml-linter	4s
Linter / ecmascript-linter	0s
Linter / style-linter	-1s
Unit tests, PHP 8.3, windows-latest	1m 14s
Unit tests, PHP 8.5, ubuntu-latest	25s
Unit tests, PHP 8.4, windows-latest	1m 5s
Unit tests, PHP 8.4, ubuntu-latest	25s
Unit tests, PHP 8.3, ubuntu-latest	32s
Unit tests, PHP 8.5, windows-latest	59s
Code coverage	6s
Cleanup artifacts	3s
	7m 2s

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