Improve CI testing #78

Job	Run time
Ruby 2.6 - macos-latest	53s
Ruby 2.7 - macos-latest	38s
Ruby 3.0 - macos-latest	26s
Ruby 3.1 - macos-latest	27s
Ruby 3.2 - macos-latest	22s
Ruby 3.3 - macos-latest	35s
Ruby head - macos-latest	27s
Ruby jruby - macos-latest	56s
Ruby jruby-head - macos-latest	1m 28s
Ruby truffleruby - macos-latest	31s
Ruby 2.6 - ubuntu-20.04	33s
Ruby 2.7 - ubuntu-20.04	34s
Ruby 3.0 - ubuntu-20.04	19s
Ruby 3.1 - ubuntu-20.04	22s
Ruby 3.2 - ubuntu-20.04	33s
Ruby 3.3 - ubuntu-20.04	28s
Ruby head - ubuntu-20.04	17s
Ruby jruby - ubuntu-20.04	1m 17s
Ruby jruby-head - ubuntu-20.04	59s
Ruby truffleruby - ubuntu-20.04	38s
Ruby mingw - windows-latest	2m 39s
Ruby mswin - windows-latest	3m 27s
Ruby jruby - windows-latest	4m 9s
Ruby head - ubuntu-22.04	17s
Ruby 3.1 - ubuntu-22.04	23s
Ruby 3.2 - ubuntu-22.04	21s
Ruby 3.3 - ubuntu-22.04	29s
	24m 28s

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