Test

Optimize `tokio::child::unix::ChildImp::wait` #50

Job	Run time
Fmt check	5s
Test on macos with Rust stable (feat: default)	29s
Test on macos with Rust stable (feat: with-tokio)	31s
Test on macos with Rust 1.68.0 (feat: default)	6m 3s
Test on macos with Rust 1.68.0 (feat: with-tokio)	5m 51s
Test on ubuntu with Rust stable (feat: default)	34s
Test on ubuntu with Rust stable (feat: with-tokio)	30s
Test on ubuntu with Rust 1.68.0 (feat: default)	3m 50s
Test on ubuntu with Rust 1.68.0 (feat: with-tokio)	6m 44s
Test on windows with Rust stable (feat: default)	1m 45s
Test on windows with Rust stable (feat: with-tokio)	2m 18s
Test on windows with Rust 1.68.0 (feat: default)	4m 59s
Test on windows with Rust 1.68.0 (feat: with-tokio)	5m 16s
	38m 55s

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