Test

Add the PHPstan checks to CI #584

Job	Run time
Lint PHP & PHP Compatibility checks.	1m 2s
Lint JS & CSS	33s
Build	32s
Test PHP 8.3 (WP latest)	2m 0s
Test PHP 8.3 (WP trunk)	2m 4s
Test PHP 8.3 (WP 6.3)	2m 15s
Test PHP 8.2 (WP latest)	2m 22s
Test PHP 8.2 (WP trunk)	2m 4s
Test PHP 8.2 (WP 6.3)	2m 20s
Test PHP 8.1 (WP latest)	1m 59s
Test PHP 8.1 (WP trunk)	2m 10s
Test PHP 8.1 (WP 6.3)	2m 17s
Test PHP 8.0 (WP latest)	1m 59s
Test PHP 8.0 (WP trunk)	2m 10s
Test PHP 8.0 (WP 6.3)	2m 3s
Test PHP 7.4 (WP latest)	1m 57s
Test PHP 7.4 (WP trunk)	2m 17s
Test PHP 7.4 (WP 6.3)	1m 57s
Test PHP 7.3 (WP latest)	1m 57s
Test PHP 7.3 (WP trunk)	2m 2s
Test PHP 7.3 (WP 6.3)	1m 55s
Test PHP 7.2 (WP latest)	2m 11s
Test PHP 7.2 (WP trunk)	2m 5s
Test PHP 7.2 (WP 6.3)	2m 0s
	46m 11s

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