Fix write timeout for COM ports (#158) #331

Job	Run time
cargo-deny (advisories)	16s
lint	30s
cargo-deny (bans licenses sources)	19s
aarch64-apple-darwin / build	1m 36s
aarch64-apple-ios / build	1m 54s
aarch64-unknown-linux-gnu / build	30s
aarch64-unknown-linux-musl / build	45s
arm-linux-androideabi / build	36s
armv7-linux-androideabi / build	30s
i686-pc-windows-gnu / build	2m 15s
i686-pc-windows-msvc / build	3m 38s
i686-unknown-linux-gnu / build	46s
i686-unknown-linux-musl / build	58s
msrv-aarch64-apple-darwin / build	39s
msrv-arm-linux-androideabi / build	43s
msrv-x86_64-pc-windows-msvc / build	1m 10s
msrv-x86_64-unknown-freebsd / build	37s
msrv-x86_64-unknown-linux-gnu / build	48s
msrv-x86_64-unknown-linux-musl / build	56s
msrv-x86_64-unknown-netbsd / build	46s
x86_64-apple-darwin / build	1m 14s
x86_64-pc-windows-gnu / build	3m 43s
x86_64-pc-windows-msvc / build	2m 59s
x86_64-unknown-freebsd / build	33s
x86_64-unknown-linux-gnu / build	52s
x86_64-unknown-linux-musl / build	45s
x86_64-unknown-netbsd / build	49s
	31m 7s

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