keycode is used at run time in 4 crates (of which 3 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) keycode version
260 1 input-emulation ^0.4.0
250 1 input-capture ^0.4.0
macroboard ^0.4.0
420 1 os-terminal dev ^0.4.0