Bump sidekiq from 6.5.12 to 7.3.7 #822

Job	Run time
linting	50s
test (40, 0, 1, 2, 3)	3m 33s
javascript_test	30s
test (40, 4, 5, 6, 7)	2m 49s
test (40, 8, 9, 10, 11)	2m 59s
test (40, 12, 13, 14, 15)	3m 31s
test (40, 16, 17, 18, 19)	3m 21s
test (40, 20, 21, 22, 23)	3m 18s
test (40, 24, 25, 26, 27)	3m 26s
test (40, 28, 29, 30, 31)	3m 6s
test (40, 32, 33, 34, 35)	2m 52s
test (40, 36, 37, 38, 39)	2m 55s
coverage	42s
build-and-deploy / build	2m 59s
build-and-deploy / deploy-development	34s
build-and-deploy / deploy-staging	1s
build-and-deploy / deploy-qa	1s
build-and-deploy / notify-development / notify-Development	3s
build-and-deploy / notify-staging	1s
build-and-deploy / deploy-production	1s
build-and-deploy / notify-qa	1s
build-and-deploy / notify-production-2	1s
build-and-deploy / notify-production	1s
	37m 35s

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