Support fourfold nested lists (#3950) #330

Job	Run time
ci / Run integration tests	2m 33s
ci / Run fuzzing tests	59s
ci / Check for commonly ignored files	6s
ci / Check health of package-lock.json file	53s
ci / Lint source files	1m 38s
ci / Build website	1m 48s
ci / Run tests on Node v12	36s
ci / Run tests on Node v14	39s
ci / Run tests on Node v16	40s
ci / Run tests on Node v17	55s
ci / Measure test coverage	1m 3s
ci / Build 'denoDist' artifact	38s
ci / Build 'npmDist' artifact	1m 20s
Deploy to `npm` branch	0s
Deploy to `deno` branch	0s
	13m 48s

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