message: refactor(core): deprecate hdPath in travelRule test
  Issue:
diff: import { strict as assert } from 'assert';
  import 'should';
  import * as _ from 'lodash';
  -import { hdPath } from '../../src/bitcoin';
  const BitGoJS = require('../../src/index');
  const bitcoin = BitGoJS.bitcoin;
  @@ -103,8 +102,8 @@ describe('Travel Rule API', function () {
  it('decrypts successfully', function () {
  const toPrivate = bitcoin.HDNode.fromSeedHex('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');
  const fromPrivate = bitcoin.makeRandomKey();
  - const path = '/99/99';
  - const toPubKey = hdPath(toPrivate).deriveKey(path).getPublicKeyBuffer().toString('hex');
  + const path = '99/99';
  + const toPubKey = toPrivate.derivePath(path).keyPair.getPublicKeyBuffer().toString('hex');
  const secret = bitgo.getECDHSecret({
  eckey: fromPrivate,
  otherPubKeyHex: toPubKey,
  