Add some more validation #101

Job	Run time
Quality control	20s
Security checks	16s
Linter	1m 26s
format('Unit tests, PHP {0}, {1}', matrix.php-versions, matrix.operating-system)	0s
format('Unit tests, PHP {0}, {1}', matrix.php-versions, matrix.operating-system)	0s
Code coverage	0s
Cleanup artifacts	0s
	2m 2s

Provide feedback