Development of 3.1.4 started. #346

Job	Run time
ruby-versions / Generate Ruby versions	2s
windows-latest 2.7	3m 18s
windows-latest 3.0	2m 2s
windows-latest 3.1	1m 56s
windows-latest 3.2	2m 7s
windows-latest 3.3	1m 32s
windows-latest 3.4	2m 29s
windows-latest mingw	2m 7s
windows-latest mswin	2m 4s
	17m 37s

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