message: fix(sdk-coin-xtz): xtz utils export typescript fix
  fix to enable typescript to infer types from xtz multisigUtils properly
  Ticket:
diff: @@ -6,6 +6,6 @@ export { TransactionBuilder } from './transactionBuilder';
  import * as Interface from './iface';
  import * as Utils from './utils';
  import * as MultisigUtils from './multisigUtils';
  -Object.assign(Utils, MultisigUtils);
  +const mergedUtils = Object.assign(Utils, MultisigUtils);
  -export { Interface, Utils };
  +export { Interface, mergedUtils as Utils };
  