Update GitHub Actions to run specs on Windows on all supported Rubies #549

Job	Run time
test-windows (2.7)	4m 44s
test-macos (2.7)	7m 10s
test-windows (3.0)	1m 55s
checks	15s
test-windows (3.1)	1m 59s
test-macos (3.0)	4m 49s
test-ubuntu (3.1, cucumber_8)	4m 16s
test-windows (3.2)	1m 50s
test-macos (3.1)	5m 24s
test-macos (3.2)	4m 38s
test-ubuntu (3.1, cucumber_9)	3m 57s
test-ubuntu (3.2, cucumber_8)	4m 2s
test-ubuntu (3.2, cucumber_9)	4m 2s
test-ubuntu (jruby-9.4, cucumber_8)	21m 43s
test-ubuntu (jruby-9.4, cucumber_9)	21m 10s
test-ubuntu (3.3.0-preview3, cucumber_8)	4m 17s
test-ubuntu (3.3.0-preview3, cucumber_9)	3m 58s
test-ubuntu (2.7, cucumber_8)	4m 10s
test-ubuntu (3.0, cucumber_8)	4m 17s
	1h 48m 36s

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