message: Update CHANGELOG for DirectSecp256k1HdWallet serialization
diff: @@ -8,6 +8,11 @@ and this project adheres to
  ### Added
  +- @cosmjs/proto-signing: Add `serialize` and `serializeWithEncryptionKey`
  + methods to `DirectSecp256k1HdWallet`. Also add `deserialize` and
  + `deserializeWithEncryptionKey` static methods.
  +- @cosmjs/proto-signing: Export `extractKdfConfiguration` and `executeKdf`
  + helper functions and `KdfConfiguration` type.
  - @cosmjs/proto-signing: Export `makeCosmoshubPath` helper.
  - @cosmjs/stargate: Export `makeCosmoshubPath` helper.
  