All tests passing on JRuby extension #360

Job	Run time
ruby-versions / Generate Ruby versions	1s
windows-latest 2.7	3m 52s
windows-latest 3.0	1m 26s
windows-latest 3.1	1m 20s
windows-latest 3.2	1m 42s
windows-latest 3.3	1m 16s
windows-latest 3.4	2m 11s
windows-latest jruby-head	2m 0s
windows-latest mingw	1m 3s
windows-latest mswin	1m 39s
	16m 30s

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