test

support Ractor #253

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (2.6 / ubuntu-latest)	23s
build (2.7 / macos-latest)	38s
build (3.0 / ubuntu-latest)	8s
build (2.7 / ubuntu-latest)	23s
build (3.2 / ubuntu-latest)	9s
build (3.0 / macos-latest)	14s
build (2.6 / macos-latest)	35s
build (3.4 / ubuntu-latest)	11s
build (truffleruby-head / macos-latest)	24s
build (3.1 / ubuntu-latest)	9s
build (3.1 / macos-latest)	13s
build (3.2 / macos-latest)	12s
build (truffleruby / ubuntu-latest)	23s
build (3.3 / ubuntu-latest)	11s
build (head / ubuntu-latest)	13s
build (3.3 / macos-latest)	17s
build (head / macos-latest)	18s
build (3.4 / macos-latest)	14s
	5m 19s

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