Use make-promises-safe to catch unhandled rejections in tests

packages/connect/package.json

@@ -2,7 +2,7 @@
     "name": "@0xproject/connect",
     "version": "0.6.12",
     "engines": {
-        "node" : ">=6.12"
+        "node": ">=6.12"
     },
     "description": "A javascript library for interacting with the standard relayer api",
     "keywords": [
@@ -74,6 +74,7 @@
         "copyfiles": "^1.2.0",
         "dirty-chai": "^2.0.1",
         "fetch-mock": "^5.13.1",
+        "make-promises-safe": "^1.1.0",
         "mocha": "^4.0.1",
         "npm-run-all": "^4.1.2",
         "nyc": "^11.0.1",

packages/connect/test/http_client_test.ts

@@ -3,6 +3,7 @@ import * as chai from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import * as dirtyChai from 'dirty-chai';
 import * as fetchMock from 'fetch-mock';
+import 'make-promises-safe';
 import 'mocha';
 
 import { HttpClient } from '../src/index';

packages/connect/test/orderbook_channel_message_parsers_test.ts

@@ -1,5 +1,6 @@
 import * as chai from 'chai';
 import * as dirtyChai from 'dirty-chai';
+import 'make-promises-safe';
 import 'mocha';
 
 import { orderbookChannelMessageParser } from '../src/utils/orderbook_channel_message_parser';

packages/connect/test/ws_orderbook_channel_test.ts

@@ -1,6 +1,7 @@
 import * as chai from 'chai';
 import * as dirtyChai from 'dirty-chai';
 import * as _ from 'lodash';
+import 'make-promises-safe';
 import 'mocha';
 
 import { WebSocketOrderbookChannel } from '../src/ws_orderbook_channel';