build

Add TruffleRuby in CI #1470

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (2.6 / ubuntu-latest)	1m 19s
build (2.6 / macos-latest)	1m 26s
build (2.6 / windows-latest)	2m 20s
build (2.7 / ubuntu-latest)	1m 23s
build (2.7 / macos-latest)	50s
build (2.7 / windows-latest)	3m 59s
build (3.0 / ubuntu-latest)	15s
build (3.0 / macos-latest)	13s
build (3.0 / windows-latest)	2m 1s
build (3.1 / ubuntu-latest)	15s
build (3.1 / macos-latest)	26s
build (3.1 / windows-latest)	2m 18s
build (3.2 / ubuntu-latest)	15s
build (3.2 / macos-latest)	15s
build (3.2 / windows-latest)	2m 39s
build (3.3 / ubuntu-latest)	15s
build (3.3 / macos-latest)	15s
build (3.3 / windows-latest)	3m 5s
build (3.4 / ubuntu-latest)	15s
build (3.4 / macos-latest)	15s
build (3.4 / windows-latest)	1m 35s
build (head / ubuntu-latest)	16s
build (head / macos-latest)	20s
build (mingw / windows-latest)	1m 31s
build (mswin / windows-2019)	2m 30s
build (truffleruby-head / ubuntu-latest)	1m 25s
	31m 38s

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