susyp2p-yamux is used at run time in 1 crate. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) susyp2p-yamux version
susyp2p ^0.7.0
1 susyp2p-kad dev ^0.7.0
1 susyp2p-ping dev ^0.7.0