CRB

CRB is used at run time in 5 crates. It is a direct run-time dependency in 4 crates.

Number of dependers	CRB version	Downloads/month
0	0.0.31	440
1	0.0.28	47
4	0.0.27	73

Depender (with downloads and own rev deps)			CRB version
		n9		^0.0.28
		hug		^0.0.27
	1	ice9-std		^0.0.27
	1	ice9-core		^0.0.27