[chore] Bump ws to version 6.1.0 (#602)

Author: darrachequesne

package.json

@@ -32,7 +32,7 @@
     "indexof": "0.0.1",
     "parseqs": "0.0.5",
     "parseuri": "0.0.5",
-    "ws": "~3.3.1",
+    "ws": "~6.1.0",
     "xmlhttprequest-ssl": "~1.5.4",
     "yeast": "0.1.2"
   },