shvproto

shvproto is used at run time in 5 crates.

Depender (with downloads and own rev deps)			shvproto version
650	4	shvrpc		^6.0
260	2	shvclient		^6.0.1
190		shvcall		^6.1.5
	1	shvbroker		^6.1.5
		historyprovider		^6.1.5