message: Update release notes for 5.1.0, 5.1.1, and 5.2.0
diff: # BitGoJS Release Notes
  +## 5.2.0
  +
  +### New Features
  +* Add support for new ERC 20 tokens (WHT, AMN, BTU, TAUD)
  +* Add support for trade payload signing
  +
  +## Bug Fixes
  +* Allow sharing "pseudo-cold" wallets where the encrypted user key is not held by BitGo.
  +* Correctly update matching wallet passphrases when the user login password is updated.
  +* Add missing filter parameters in `wallet.transfers`.
  +
  +## Other Changes
  +* Update README to clarify package description and improve example snippets
  +
  +## 5.1.1
  +
  +## Bug Fixes
  +* Separate input signing and signature verification steps in `AbstractUtxoCoin.signTransaction`. This fixes an issue where Native Segwit inputs which were not the last input in the transaction were not being properly constructed.
  +
  +## 5.1.0
  +
  +### New Features
  +* Add support for counting the number of valid signatures on Native Segwit transaction inputs in `explainTransaction`.
  +
  +### Bug Fixes
  +* Update `bitgo-express` startup command in README. Running directly from the cloned git repository is no longer recommended.
  +* Add install size and timing metrics to CI system.
  +
  +### Other Changes
  +* Remove version 1 support for Ethereum wallets and associated tests. This functionality has been broken for some time due to the required server side routes being removed.
  +
  +**V2 Ethereum wallets are unaffected**. If your Ethereum wallet was working before this change, it will continue functioning normally.
  +
  ## 5.0.4
  ### Bug Fixes
  