fix(package): update simple-websocket to version 9.0.0

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "run-series": "^1.1.8",
     "simple-get": "^4.0.0",
     "simple-peer": "^9.7.1",
-    "simple-websocket": "^8.1.1",
+    "simple-websocket": "^9.0.0",
     "string2compact": "^1.3.0",
     "unordered-array-remove": "^1.0.2",
     "ws": "^7.3.0"