Test on new rubies #51

Job	Run time
tests (ubuntu-latest, 2.5)	31s
tests (ubuntu-latest, 2.6)	34s
tests (ubuntu-latest, 2.7)	32s
tests (ubuntu-latest, 3.0)	11s
tests (ubuntu-latest, 3.1)	21s
tests (ubuntu-latest, 3.2)	11s
tests (ubuntu-latest, 3.3)	11s
tests (ubuntu-latest, head)	12s
tests (ubuntu-latest, jruby)	1m 3s
tests (ubuntu-latest, jruby-head)	56s
tests (ubuntu-latest, truffleruby)	45s
tests (macos-latest, 2.5)	1m 41s
tests (macos-latest, 2.6)	1m 34s
tests (macos-latest, 2.7)	1m 5s
tests (macos-latest, 3.0)	44s
tests (macos-latest, 3.1)	1m 40s
tests (macos-latest, 3.2)	52s
tests (macos-latest, 3.3)	34s
tests (macos-latest, head)	37s
tests (macos-latest, jruby)	2m 15s
tests (macos-latest, jruby-head)	1m 55s
tests (macos-latest, truffleruby)	2m 10s
	20m 34s

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