Tests

Update Rubocop Ruby version target #79

Job	Run time
test (ubuntu-latest, head)	12s
test (ubuntu-latest, 3.4)	1m 9s
test (ubuntu-latest, 3.3)	7s
test (ubuntu-latest, 3.2)	14s
test (ubuntu-latest, 3.1)	12s
test (ubuntu-latest, 3.0)	12s
test (ubuntu-latest, jruby)	32s
test (ubuntu-latest, jruby-head)	49s
test (ubuntu-latest, truffleruby)	20s
test (ubuntu-latest, truffleruby-head)	30s
test (ubuntu-latest, truffleruby+graalvm)	1m 12s
test (windows-latest, head)	1m 24s
test (windows-latest, 3.4)	2m 46s
test (windows-latest, mingw)	59s
test (windows-latest, mswin)	1m 25s
test (windows-latest, ucrt)	1m 43s
test (macos-latest, head)	14s
test (macos-latest, 3.4)	1m 16s
	15m 16s

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