GitHub CI: Add action for publishing tagged releases on crates.io #33

Job	Run time
build (x86_64-unknown-linux-gnu, rtu)	18s
build (x86_64-unknown-linux-gnu, tcp)	22s
build (x86_64-unknown-linux-gnu, rtu-sync)	20s
build (x86_64-unknown-linux-gnu, tcp-sync)	31s
build (x86_64-unknown-linux-gnu, rtu-server)	25s
build (x86_64-unknown-linux-gnu, tcp-server)	19s
build (x86_64-apple-darwin, rtu)	37s
build (x86_64-apple-darwin, tcp)	38s
build (x86_64-apple-darwin, rtu-sync)	52s
build (x86_64-apple-darwin, tcp-sync)	38s
build (x86_64-apple-darwin, rtu-server)	1m 16s
build (x86_64-apple-darwin, tcp-server)	42s
build (x86_64-pc-windows-msvc, rtu)	2m 14s
build (x86_64-pc-windows-msvc, tcp)	2m 25s
build (x86_64-pc-windows-msvc, rtu-sync)	2m 26s
build (x86_64-pc-windows-msvc, tcp-sync)	2m 0s
build (x86_64-pc-windows-msvc, rtu-server)	2m 6s
build (x86_64-pc-windows-msvc, tcp-server)	2m 57s
	21m 6s

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