Create a base16 implementation to have a `toHex` function as seen in the [Java implementation](https://github.com/multiformats/java-multihash/blob/3b03f9bbc4a8e7a76721ef0f456a11b911e95ff9/src/main/java/io/ipfs/multihash/Multihash.java#L223)
Create a base16 implementation to have a
toHexfunction as seen in the Java implementation