Increase CI supported versions (#34) #37

Job	Run time
Tests / Fetch supported versions	8s
Tests / Static analysis	29s
Tests / Bare minimum - Special case - Symfony 5.4	12s
Tests / Bare minimum	21s
Tests / Late migration - Symfony	25s
Tests / Up to date versions - Special case - Symfony 5.4	19s
Tests / Late migration - PHP	30s
Tests / Up to date versions	22s
Tests / Nightly - Symfony - With highest supported PHP version	24s
Tests / Nightly - PHP - With lowest supported Symfony versions	24s
Tests / Nightly - Symfony - With lowest supported PHP version	18s
Tests / Nightly - PHP - With highest supported Symfony versions	24s
	4m 16s

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