CI: Attempt to get a JRuby test passing #70

Job	Run time
ruby-versions / Generate Ruby versions	4s
test (2.5, ubuntu-latest)	41s
test (2.5, windows-latest)	3m 41s
test (2.6, ubuntu-latest)	44s
test (2.6, macos-latest)	51s
test (2.6, windows-latest)	4m 0s
test (2.7, ubuntu-latest)	44s
test (2.7, macos-latest)	41s
test (2.7, windows-latest)	3m 58s
test (3.0, ubuntu-latest)	19s
test (3.0, macos-latest)	23s
test (3.0, windows-latest)	1m 27s
test (3.1, ubuntu-latest)	22s
test (3.1, macos-latest)	18s
test (3.1, windows-latest)	1m 46s
test (3.2, ubuntu-latest)	23s
test (3.2, macos-latest)	18s
test (3.2, windows-latest)	2m 3s
test (3.3, ubuntu-latest)	18s
test (3.3, macos-latest)	17s
test (3.3, windows-latest)	2m 50s
test (head, ubuntu-latest)	20s
test (head, macos-latest)	18s
test (head, windows-latest)	1m 46s
test (jruby, ubuntu-latest)	1m 28s
test (jruby, macos-latest)	56s
test (jruby, windows-latest)	42m 33s
test (jruby-head, ubuntu-latest)	1m 13s
test (jruby-head, macos-latest)	55s
test (jruby-head, windows-latest)	42m 33s
test (windows-latest, ucrt)	1m 30s
test (windows-latest, mingw)	1m 39s
test (windows-latest, mswin)	2m 46s
test (macos-13, 2.5)	2m 1s
	2h 6m 6s

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