test

Add windows to CI matrix #278

Job	Run time
ruby-versions / Generate Ruby versions	3s
build (2.6 / macos-latest)	34s
build (3.3 / ubuntu-latest)	10s
build (3.1 / ubuntu-latest)	10s
build (2.7 / ubuntu-latest)	25s
build (2.7 / macos-latest)	34s
build (3.0 / ubuntu-latest)	14s
build (head / ubuntu-latest)	10s
build (3.2 / ubuntu-latest)	15s
build (3.3 / macos-latest)	14s
build (3.4 / ubuntu-latest)	11s
build (3.1 / macos-latest)	15s
build (truffleruby-head / macos-latest)	41s
build (3.2 / macos-latest)	20s
build (3.4 / macos-latest)	15s
build (2.6 / ubuntu-latest)	26s
build (3.0 / macos-latest)	16s
build (3.4 / windows-latest)	1m 7s
build (2.6 / windows-latest)	1m 57s
build (truffleruby / ubuntu-latest)	24s
build (head / macos-latest)	18s
	8m 59s

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