Merge pull request #68 from nobu/c2x-pedantic #1164

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-22.04 2.7	42s
ubuntu-22.04 3.0	18s
ubuntu-22.04 3.1	20s
ubuntu-22.04 3.2	19s
ubuntu-22.04 3.3	22s
ubuntu-22.04 head	20s
ubuntu-20.04 2.7	44s
ubuntu-20.04 3.0	18s
ubuntu-20.04 3.1	20s
ubuntu-20.04 3.2	23s
ubuntu-20.04 3.3	18s
ubuntu-20.04 head	20s
macos-13 2.7	1m 34s
macos-13 3.0	47s
macos-13 3.1	31s
macos-13 3.2	33s
macos-13 3.3	29s
macos-13 head	37s
macos-12 2.7	1m 35s
macos-12 3.0	29s
macos-12 3.1	32s
macos-12 3.2	27s
macos-12 3.3	28s
macos-12 head	40s
windows-latest 2.7	4m 55s
windows-latest 3.0	3m 20s
windows-latest 3.1	2m 42s
windows-latest 3.2	3m 43s
windows-latest 3.3	3m 55s
windows-latest ucrt	3m 5s
windows-latest mswin	3m 4s
ubuntu-20.04 jruby	1m 17s
ubuntu-20.04 jruby-head	1m 22s
	40m 52s

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