Canary

Canary is used at run time in 4 crates.

Number of dependers	Canary version	Downloads/month
2	0.3.3	0
1	0.1.6	0
1	0.0.6	0

Depender (with downloads and own rev deps)			Canary version
	1	srpc		^0.1.6
		saildb		^0.0.6
		june		^0.3.2
	1	maquio		^0.3.1