Looks like this is pulling in an outdated version of subtle through pulling in an outdated version of curve25519-dalek ?
error[E0554]: #![feature] may not be used on the stable release channel
--> /home/aep/.cargo/registry/src/github.com-1ecc6299db9ec823/subtle-0.3.0/src/lib.rs:20:34
|
20 | #![cfg_attr(feature = "nightly", feature(i128_type))]
| ^^^^^^^^^^^^^^^^^^^
Looks like this is pulling in an outdated version of subtle through pulling in an outdated version of curve25519-dalek ?