message: fix(utxo-lib): default to `version: 2` for BTG transactions
  We do this in the SDK so why not do it in utxo-lib already.
  The meaning of the version field is explained in BIP0068:
  Issue: BG_34381
diff: @@ -52,6 +52,7 @@ export function setTransactionBuilderDefaults(txb: TransactionBuilder, network:
  switch (getMainnet(network)) {
  case networks.bitcoincash:
  case networks.bitcoinsv:
  + case networks.bitcoingold:
  txb.setVersion(2);
  break;
  case networks.zcash:
  