Enhancement: Add `step` to composite variants #181

Job	Run time
build-8-6-1	1m 31s
build-10-5-0	1m 31s
build-6-6-0	1m 23s
build-7-5-0	1m 28s
build-5-8-0	2m 2s
build-9-5-1	1m 29s
test-nogitdiff	20s
build-2-10-7	1m 43s
build-2-3-0-0	38s
build-2-4-6-0	49s
build-2-6-20	52s
build-2-7-17	46s
build-2-8-19	46s
build-2-9-18	1m 0s
build-4-8-0	1m 52s
update-draft-release	0s
update-dockerhub-description	0s
publish-draft-release	0s
	18m 10s

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