build(deps): Update snow requirement from 0.8.0 to 0.9.0 (#2472)

* build(deps): Update snow requirement from 0.8.0 to 0.9.0

Updates the requirements on [snow](https://github.com/mcginty/snow) to permit the latest version.
- [Release notes](https://github.com/mcginty/snow/releases)
- [Commits](mcginty/snow@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: snow
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Inden <[email protected]>

Author: dependabot[bot]

transports/noise/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 - Update to `libp2p-core` `v0.32.0`.
 
+- Update to `snow` `v0.9.0`. See [PR 2472].
+
+[PR 2472]: https://github.com/libp2p/rust-libp2p/pull/2472
+
 # 0.34.0 [2022-01-27]
 
 - Update dependencies.

transports/noise/Cargo.toml

@@ -23,10 +23,10 @@ x25519-dalek = "1.1.0"
 zeroize = "1"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-snow = { version = "0.8.0", features = ["ring-resolver"], default-features = false }
+snow = { version = "0.9.0", features = ["ring-resolver"], default-features = false }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-snow = { version = "0.8.0", features = ["default-resolver"], default-features = false }
+snow = { version = "0.9.0", features = ["default-resolver"], default-features = false }
 
 [dev-dependencies]
 async-io = "1.2.0"

transports/noise/src/protocol/x25519.rs

@@ -260,7 +260,7 @@ impl snow::types::Dh for Keypair<X25519> {
         secret.zeroize();
     }
 
-    fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), ()> {
+    fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), snow::Error> {
         let mut p = [0; 32];
         p.copy_from_slice(&pk[..32]);
         let ss = x25519((self.secret.0).0, p);

transports/noise/src/protocol/x25519_spec.rs

@@ -176,7 +176,7 @@ impl snow::types::Dh for Keypair<X25519Spec> {
         secret.zeroize();
     }
 
-    fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), ()> {
+    fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), snow::Error> {
         let mut p = [0; 32];
         p.copy_from_slice(&pk[..32]);
         let ss = x25519((self.secret.0).0, p);