fix(package): update ws to version 7.1.1

greenkeeper[bot] · greenkeeper[bot] · commit c1161e7b4077 · 2019-07-19T14:49:09.000Z
Closes #268
diff --git a/package.json b/package.json
@@ -97,7 +97,7 @@
     "request-promise": "^4.2.2",
     "rx-queue": "^0.6.1",
     "rxjs": "^6.2.1",
-    "ws": "^6.0.0",
+    "ws": "^7.1.1",
     "xml2js": "^0.4.19"
   },
   "greenkeeper": {
