fix: Return timeout and add monitor test #393

Job	Run time
Check lib (x86_64-unknown-linux-gnu)	33s
Check (x86_64-apple-darwin)	52s
Check lib (aarch64-unknown-linux-gnu)	1m 22s
Clippy (x86_64-unknown-linux-gnu)	1m 8s
Check (x86_64-unknown-linux-gnu)	52s
Check lib (armv7-unknown-linux-gnueabihf)	1m 30s
Clippy (aarch64-unknown-linux-gnu)	2m 17s
Check (x86_64-unknown-linux-musl)	1m 2s
Clippy (armv7-unknown-linux-gnueabihf)	1m 44s
Check (x86_64-pc-windows-msvc)	2m 48s
Check (aarch64-unknown-linux-gnu)	1m 48s
Check MSRV (x86_64-unknown-linux-gnu)	1m 4s
Check (armv7-unknown-linux-gnueabihf)	2m 22s
Check MSRV (aarch64-unknown-linux-gnu)	2m 54s
Rustfmt	7s
Check MSRV (armv7-unknown-linux-gnueabihf)	2m 20s
Unit Tests (x86_64-unknown-linux-gnu)	57s
Unit Tests (aarch64-unknown-linux-gnu)	1m 45s
Unit Tests (armv7-unknown-linux-gnueabihf)	1m 56s
	29m 21s

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