message: Use `base16` for hex encoding
diff: @@ -12,7 +12,6 @@ use num_rational::Ratio;
  use rand::{prelude::SliceRandom, Rng};
  use serde::{Deserialize, Serialize};
  use smallvec::smallvec;
  -use uint::hex;
  use casper_hashing::Digest;
  use casper_types::{
  @@ -2084,7 +2083,7 @@ fn should_read_legacy_unbonding_purse() {
  // that are consistent with what we keep in the current storage.
  const LEGACY_BYTES: &str = "0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e0e07010000002000000000000000197f6b23e16c8532c6abc838facd5ea789be0c76b2920334039bfa8b3d368d610100000020000000000000004508a07aa941707f3eb2db94c8897a80b2c1197476b6de213ac273df7d86c4ffffffffffffffffff40feffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff";
  - let decoded = hex::decode(LEGACY_BYTES).expect("decode");
  + let decoded = base16::decode(LEGACY_BYTES).expect("decode");
  let deserialized: UnbondingPurse = deserialize_internal(&decoded)
  .expect("should deserialize w/o error")
  .expect("should be Some");
  