message: remove reference to hex crate.
diff: @@ -713,7 +713,7 @@ mod get_dictionary_item {
  .await,
  Err(Error::CryptoError {
  context: "state_root_hash",
  - error: CryptoError::FromHex(FromHexError::OddLength)
  + error: CryptoError::FromHex(base16::DecodeError::InvalidLength { length: _ })
  })
  ));
  }
  