Bump const-hex from 1.11.4 to 1.12.0 (#140)

Bumps [const-hex](https://github.com/danipopes/const-hex) from 1.11.4 to 1.12.0.
- [Commits](DaniPopes/const-hex@v1.11.4...v1.12.0)

---
updated-dependencies:
- dependency-name: const-hex
  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

@@ -28,7 +28,7 @@ inherits    = "dev"
 serde = { version = "1.0", optional = true, default-features = false }
 
 [dev-dependencies]
-const-hex  = { version = "1.11" }
+const-hex  = { version = "1.12" }
 criterion  = { version = "0.5" }
 faster-hex = { version = "0.9" }
 hex        = { version = "0.4" }