demand

demand is used at run time in 4 crates.

Number of dependers	demand version	Downloads/month
3	1.2.3	1.6K
0	1.1.2	3.5K
1	0.3.0	18

Depender (with downloads and own rev deps)			demand version
8.3K		mise		^1.1.2
440		key		^1.1.0
390		zeeper		^1.2.2
		rtx-cli		^0.3