Merge pull request #604 from creative-commoners/pulls/6/graphql-optional #583

Job	Run time
CI / Generate matrix	22s
CI / Context	1s
CI / Check governance	1s
CI / 8.3 prf-low mariadb phpunit all	3m 59s
CI / 8.3 mysql80 phpunit all	4m 29s
CI / 8.3 mysql80 phplinting	2m 1s
CI / 8.3 mysql80 endtoend asset-admin	19m 26s
CI / 8.3 mysql80 endtoend versioned-admin	9m 34s
CI / 8.3 mysql80 endtoend silverstripe-elemental	41m 34s
CI / Dispatch tag patch release	3s
	1h 21m 30s

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