Second attempt at switching on Monaco #622

Job	Run time
JS Tests (18.x)	3m 10s
Build and run integration tests (18.x)	3m 27s
JS Tests (19.x)	3m 6s
Lint (18.x)	33s
Build and run integration tests (19.x)	3m 34s
JS Tests (20.x)	3m 1s
Lint (19.x)	31s
Build and run integration tests (20.x)	3m 10s
JS Tests (21.x)	2m 58s
Lint (20.x)	28s
Lint (21.x)	29s
Build and run integration tests (21.x)	3m 12s
Publish to NPM	0s
	27m 39s

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