Bump hex from 0.4.1 to 0.4.2

Bumps [hex](https://github.com/KokaKiwi/rust-hex) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/KokaKiwi/rust-hex/releases)
- [Commits](https://github.com/KokaKiwi/rust-hex/compare/v0.4.1...v0.4.2)

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

Cargo.lock

@@ -599,9 +599,9 @@ dependencies = [
 
 [[package]]
 name = "hex"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76cdda6bf525062a0c9e8f14ee2b37935c86b8efb6c8b69b3c83dfb518a914af"
+checksum = "644f9158b2f133fd50f5fb3242878846d9eb792e445c893805ff0e3824006e35"
 
 [[package]]
 name = "http"