feat: add acceptance tests #209

Job	Run time
phpunit (mysql:8.0, v6.6.0.0, 8.2, true)	13m 31s
phpunit (mysql:8.0, v6.6.0.0, 8.2, false)	12m 24s
phpunit (mysql:8.0, v6.6.0.0, 8.3, true)	12m 24s
phpunit (mysql:8.0, v6.6.0.0, 8.3, false)	11m 36s
phpunit (mysql:8.0, 6.6.x, 8.2, true)	11m 59s
phpunit (mysql:8.0, 6.6.x, 8.2, false)	10m 45s
phpunit (mysql:8.0, 6.6.x, 8.3, true)	11m 19s
phpunit (mysql:8.0, 6.6.x, 8.3, false)	10m 37s
phpunit (mariadb:10.11, v6.6.0.0, 8.2, true)	12m 24s
phpunit (mariadb:10.11, v6.6.0.0, 8.2, false)	11m 23s
phpunit (mariadb:10.11, v6.6.0.0, 8.3, true)	12m 10s
phpunit (mariadb:10.11, v6.6.0.0, 8.3, false)	11m 23s
phpunit (mariadb:10.11, 6.6.x, 8.2, true)	11m 9s
phpunit (mariadb:10.11, 6.6.x, 8.2, false)	9m 48s
phpunit (mariadb:10.11, 6.6.x, 8.3, true)	10m 39s
phpunit (mariadb:10.11, 6.6.x, 8.3, false)	9m 42s
Build and validate zip / Build and Validate	1m 8s
	3h 4m 21s

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