ErasedChild::signal takes &self #54

Job	Run time
Fmt check	10s
Test on macos with Rust stable (feat: default)	41s
Test on macos with Rust stable (feat: with-tokio)	1m 2s
Test on macos with Rust 1.68.0 (feat: default)	6m 37s
Test on macos with Rust 1.68.0 (feat: with-tokio)	7m 28s
Test on ubuntu with Rust stable (feat: default)	21s
Test on ubuntu with Rust stable (feat: with-tokio)	25s
Test on ubuntu with Rust 1.68.0 (feat: default)	3m 51s
Test on ubuntu with Rust 1.68.0 (feat: with-tokio)	4m 9s
Test on windows with Rust stable (feat: default)	1m 7s
Test on windows with Rust stable (feat: with-tokio)	1m 18s
Test on windows with Rust 1.68.0 (feat: default)	5m 8s
Test on windows with Rust 1.68.0 (feat: with-tokio)	5m 32s
	37m 49s

Provide feedback