Implement @oneOf input types (#146) #593

Job	Run time
JS Tests (18.x)	2m 49s
JS Tests (19.x)	2m 44s
Build and run integration tests (18.x)	2m 46s
Lint (18.x)	38s
JS Tests (20.x)	2m 34s
Build and run integration tests (19.x)	2m 52s
Lint (19.x)	42s
JS Tests (21.x)	2m 42s
Build and run integration tests (20.x)	2m 42s
Lint (20.x)	39s
Build and run integration tests (21.x)	2m 34s
Lint (21.x)	36s
Publish to NPM	46s
	25m 4s

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