It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) Deadline version
350 3 pea2pea dev ^0.2
120 1 kadmium dev ^0.2.0
4 snarkos-node-router dev ^0.2
3 snarkos-node-bft dev ^0.2
5 snarkos-node dev ^0.2
quickie dev ^0.2