API Update code to reflect changes from silverstripe/cms (#1346) #806

Job	Run time
CI / Context	2s
CI / Generate matrix	22s
CI / Check governance	3s
CI / 8.3 prf-low mariadb phpunit all	3m 47s
CI / 8.3 mysql80 phpunit all	4m 27s
CI / 8.3 mysql84 phpunit all	5m 10s
CI / 8.3 mysql80 phplinting	1m 54s
CI / 8.3 mysql80 endtoend root	5m 36s
CI / 8.3 mysql80 js	4m 3s
CI / 8.3 mysql80 doclinting	3m 30s
CI / Dispatch tag patch release	2s
	28m 56s

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