Test

Add `SetExtLinux#wait_until` #307

Job	Run time
rustfmt	23s
semver	31s
clippy (macos-latest, stable)	35s
clippy (macos-latest, 1.61)	35s
clippy (windows-latest, stable)	28s
clippy (windows-latest, 1.61)	27s
clippy (ubuntu-latest, stable)	28s
clippy (ubuntu-latest, 1.61)	26s
test	0s
miri	0s
	3m 53s

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