Updated websocket-stream to @httptoolkit/websocket-stream (#432)

* switch to use httptoolkit/websocket-stream

Author: xiazhvera

device/lib/ws.js

@@ -16,7 +16,7 @@
 //node.js deps
 
 //npm deps
-var websocket = require('websocket-stream');
+var websocket = require('@httptoolkit/websocket-stream');
 
 //app deps
 

package.json

@@ -31,7 +31,7 @@
     "crypto-js": "4.2.0",
     "minimist": "1.2.6",
     "mqtt": "4.2.8",
-    "websocket-stream": "^5.5.2"
+    "@httptoolkit/websocket-stream": "^6.0.1"
   },
   "devDependencies": {
     "gulp": "^3.9.0",