fix(package): update ws to version 2.2.2 (#348)

https://greenkeeper.io/

package.json

@@ -115,7 +115,7 @@
     "retry-promise": "1.0.0",
     "socket.io": "1.7.3",
     "selenium-webdriver": "3.3.0",
-    "ws": "2.2.1"
+    "ws": "2.2.2"
   },
   "devDependencies": {
     "@types/body-parser": "1.16.0",