Bump digest from 0.9.0 to 0.10.0

Bumps [digest](https://github.com/RustCrypto/traits) from 0.9.0 to 0.10.0.
- [Release notes](https://github.com/RustCrypto/traits/releases)
- [Commits](https://github.com/RustCrypto/traits/compare/digest-v0.9.0...digest-v0.10.0)

---
updated-dependencies:
- dependency-name: digest
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -87,7 +87,7 @@ dependencies = [
  "chacha20poly1305",
  "chrono",
  "derive_more",
- "digest 0.9.0",
+ "digest 0.10.0",
  "ecies-ed25519",
  "ed25519-dalek",
  "getopts",

Cargo.toml

@@ -15,7 +15,7 @@ getopts = "0.2.21"
 log = "0.4.14"
 simplelog = "0.11.0"
 toml = "0.5.8"
-digest = "0.9.0"
+digest = "0.10.0"
 sha2 = "0.10.0"
 ed25519-dalek = "1.0"
 x25519-dalek = "1.2"