build

Add TruffleRuby in CI #1468

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (2.6 / ubuntu-latest)	28s
build (2.6 / macos-latest)	31s
build (2.6 / windows-latest)	4m 12s
build (2.7 / ubuntu-latest)	28s
build (2.7 / macos-latest)	27s
build (2.7 / windows-latest)	2m 5s
build (3.0 / ubuntu-latest)	14s
build (3.0 / macos-latest)	14s
build (3.0 / windows-latest)	2m 11s
build (3.1 / ubuntu-latest)	14s
build (3.1 / macos-latest)	13s
build (3.1 / windows-latest)	2m 17s
build (3.2 / ubuntu-latest)	17s
build (3.2 / macos-latest)	17s
build (3.2 / windows-latest)	2m 3s
build (3.3 / ubuntu-latest)	14s
build (3.3 / macos-latest)	12s
build (3.3 / windows-latest)	2m 16s
build (3.4 / ubuntu-latest)	15s
build (3.4 / macos-latest)	23s
build (3.4 / windows-latest)	1m 49s
build (head / ubuntu-latest)	13s
build (head / macos-latest)	15s
build (mingw / windows-latest)	1m 23s
build (mswin / windows-2019)	1m 11s
build (truffleruby-head / ubuntu-latest)	44s
	25m 8s

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