Bump hex-literal from 0.3.4 to 0.4.1 (#123)

Bumps [hex-literal](https://github.com/RustCrypto/utils) from 0.3.4 to 0.4.1.
- [Release notes](https://github.com/RustCrypto/utils/releases)
- [Commits](RustCrypto/utils@hex-literal-v0.3.4...hex-literal-v0.4.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -31,7 +31,7 @@ rand_core = { version = "0.6.4", optional = true, default-features = false }
 signature = { version = "2", optional = true, default-features = false }
 
 [dev-dependencies]
-hex-literal = "0.3"
+hex-literal = "0.4"
 digest = { version = "0.10", features = ["dev"] }
 
 [features]