[chore] Bump ws to latest version (#587)

Author: yosiat

package.json

@@ -27,10 +27,10 @@
   "dependencies": {
     "accepts": "~1.3.4",
     "base64id": "2.0.0",
+    "cookie": "0.3.1",
     "debug": "~4.1.0",
     "engine.io-parser": "~2.1.0",
-    "ws": "~6.1.0",
-    "cookie": "0.3.1"
+    "ws": "^7.1.2"
   },
   "devDependencies": {
     "babel-eslint": "^8.0.2",