message: don't export cbor intenal mod
diff: @@ -7,7 +7,7 @@ use self::rcw::blake2b::Blake2b;
  use hdwallet::{XPub};
  -pub mod cbor {
  +mod cbor {
  #[derive(Debug, PartialEq, PartialOrd, Eq, Ord, Copy, Clone)]
  pub enum MajorType {
  UINT,
  