Tests

feat(worker): better handling of concurrency when fetching jobs (#2242) #3721

Job	Run time
coverage for node@lts, redis@7	4m 43s
testing node@lts/*, dragonflydb@latest	5m 37s
testing [email protected], redis@7-alpine	2m 13s
testing node@lts/*, redis@7-alpine	4m 33s
testing node@lts/-1, redis@7-alpine	4m 23s
testing node@lts/-2, redis@7-alpine	4m 24s
testing node@current, redis@7-alpine	4m 35s
testing node@lts/*, redis@6-alpine	4m 34s
	35m 2s

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