message: Add release notes for releases 4.48.0 and 4.48.1
diff: # BitGoJS Release Notes
  +## 4.48.1
  +### Bug Fixes
  +- Treat errors thrown from `verifySignature` as an invalid signature
  +
  +## 4.48.0
  +### New Features
  +- Add ability to count signatures on a utxo transaction to `explainTransaction()`
  +- Add support for generating unsigned sweep transactions for Stellar Lumens (XLM) and Ripple XRP (XRP)
  +- Add support for recovering Bitcoin Satoshi Vision (BSV) inadvertently sent to a Bitcoin (BTC) address
  +- Add support for new ERC 20 Tokens (BAX, HXRO, RFR, CPLT, CSLV, CGLD, NZDX, JPYX, RUBX, CNYX, CHFX, USDX, EURX, GBPX, AUDX, CADX, GLDX, SLVX, SLOT, TCAT, TFMF)
  +
  +### Bug Fixes
  +- Improve handling proxy request timeouts from bitgo-express
  +- Prevent rebuilding OFC transactions upon transaction approval
  +- Allow creation of new addresses on wallets returned from `wallets().list()`
  +- Return actual fee used from `wallet.sendMany()` instead of fee estimate
  +- Fix date and name on LICENSE
  +- Update dev-dependency karma to 4.0.1 to fix minor upstream vulnerability
  +- Allow accessing `oauth/token` route from bitgo-express
  +- Add `.nvmrc` with version set to `lts/carbon`
  +- Fix ERC 20 Token BID decimal places
  +
  +### API changes
  +- Remove `bech32` parameter option from `createAddress`
  +- Add `strategy` parameter option to `prebuildTransaction` for setting the preferred unspent selection strategy
  +
  ## 4.47.0
  ### New Features
  - Add support for new ERC 20 Token (BAX)
  