updated ws dependency

Author: Aleix Morgadas

package.json

@@ -56,7 +56,7 @@
     "request-promise-native": "^1.0.5",
     "rxjs": "^5.5.2",
     "utf8": "^2.1.2",
-    "ws": "^3.3.1"
+    "ws": "^5.2.0"
   },
   "peerDependencies": {
     "js-joda": "^1.6.2",