Test

Add `SetExtLinux#wait_until` #304

Job	Run time
rustfmt	18s
semver	2m 40s
clippy (macos-latest, stable)	25s
clippy (macos-latest, 1.61)	26s
clippy (windows-latest, stable)	25s
clippy (windows-latest, 1.61)	24s
clippy (ubuntu-latest, stable)	18s
clippy (ubuntu-latest, 1.61)	24s
test	0s
miri	0s
	5m 20s

Provide feedback