Bump2version

It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps)			Bump2version version
550		openbook	dev	^0.1.3
150		rping	dev	^0.1.3
140		ipcap	dev	^0.1.3
110		emitter-rs	dev	^0.1.3
	1	gems	dev	^0.1.2