Unify versions #219

Job	Run time
ruby-versions / Generate Ruby versions	7s
ubuntu-20.04 2.3	28s
ubuntu-20.04 2.4	27s
ubuntu-20.04 2.5	29s
ubuntu-20.04 2.6	32s
ubuntu-20.04 2.7	28s
ubuntu-20.04 3.0	17s
ubuntu-20.04 3.1	15s
ubuntu-20.04 3.2	16s
ubuntu-20.04 head	16s
ubuntu-20.04 jruby	30s
ubuntu-20.04 jruby-head	27s
ubuntu-22.04 2.3	25s
ubuntu-22.04 2.4	26s
ubuntu-22.04 2.5	27s
ubuntu-22.04 2.6	24s
ubuntu-22.04 2.7	30s
ubuntu-22.04 3.0	15s
ubuntu-22.04 3.1	20s
ubuntu-22.04 3.2	17s
ubuntu-22.04 head	14s
ubuntu-22.04 jruby	32s
ubuntu-22.04 jruby-head	29s
macos-11 2.3	59s
macos-11 2.4	55s
macos-11 2.5	56s
macos-11 2.6	52s
macos-11 2.7	56s
macos-11 3.0	20s
macos-11 3.1	21s
macos-11 3.2	22s
macos-11 head	24s
macos-11 jruby	35s
macos-11 jruby-head	37s
macos-12 2.3	50s
macos-12 2.4	49s
macos-12 2.5	1m 21s
macos-12 2.6	1m 28s
macos-12 2.7	52s
macos-12 3.0	19s
macos-12 3.1	18s
macos-12 3.2	21s
macos-12 head	19s
macos-12 jruby	43s
macos-12 jruby-head	49s
windows-latest 2.3	1m 30s
windows-latest 2.4	1m 59s
windows-latest 2.5	2m 36s
windows-latest 2.6	1m 34s
windows-latest 2.7	1m 44s
windows-latest 3.0	1m 10s
windows-latest 3.1	1m 6s
windows-latest 3.2	1m 16s
windows-latest head	1m 18s
windows-latest mswin	1m 12s
ubuntu-latest jruby-9.1	39s
ubuntu-latest jruby-9.2	46s
ubuntu-latest jruby-9.3	29s
macos-latest truffleruby	1m 0s
ubuntu-latest truffleruby	31s
	43m 7s

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