Keep the requirements at PHP 5.6 and WP 4.6 until we have a practical… #597

Job	Run time
Lint PHP & PHP Compatibility checks.	1m 4s
Lint JS & CSS	37s
Build	39s
Test PHP 8.3 (WP latest)	2m 18s
Test PHP 8.3 (WP trunk)	2m 27s
Test PHP 8.3 (WP 6.3)	2m 18s
Test PHP 8.2 (WP latest)	1m 57s
Test PHP 8.2 (WP trunk)	2m 15s
Test PHP 8.2 (WP 6.3)	1m 58s
Test PHP 8.1 (WP latest)	2m 27s
Test PHP 8.1 (WP trunk)	2m 33s
Test PHP 8.1 (WP 6.3)	2m 4s
Test PHP 8.0 (WP latest)	2m 0s
Test PHP 8.0 (WP trunk)	2m 15s
Test PHP 8.0 (WP 6.3)	1m 59s
Test PHP 7.4 (WP latest)	1m 52s
Test PHP 7.4 (WP trunk)	1m 58s
Test PHP 7.4 (WP 6.3)	1m 53s
Test PHP 7.3 (WP latest)	1m 59s
Test PHP 7.3 (WP trunk)	2m 7s
Test PHP 7.3 (WP 6.3)	1m 54s
Test PHP 7.2 (WP latest)	2m 3s
Test PHP 7.2 (WP trunk)	2m 11s
Test PHP 7.2 (WP 6.3)	2m 1s
	46m 49s

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