test

Refactor #65

Job	Run time
steep-check (head)	25s
check-misc (head)	8s
test-memory (head)	50m 46s
test-ruby (head, master)	5m 46s
test-windows (head)	22m 3s
test-ruby (3.0, master)	5m 47s
ruby-versions / Generate Ruby versions	3s
test-cpp (head, g++)	52m 49s
test (2.5)	1h 14m 48s
test-cpp (head, clang++)	52m 41s
test (2.6)	1h 28m 25s
test (2.7)	1h 26m 28s
test (3.0)	51m 25s
test (3.1)	52m 8s
test (3.2)	52m 18s
test (3.3)	55m 58s
test (head)	53m 15s
	11h 45m 13s

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