fix: upgrade ws from 8.11.0 to 8.12.0

Snyk has created this PR to upgrade ws from 8.11.0 to 8.12.0.

See this package in npm:
https://www.npmjs.com/package/ws

See this project in Snyk:
https://app.snyk.io/org/mystikfluu/project/c5b23892-809c-4121-9c2f-67962c7a4953?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -16,7 +16,7 @@
     "spdy": "^4.0.2",
     "uglify-js": "^3.17.4",
     "unsafe_encrypt": "^1.0.4",
-    "ws": "^8.11.0"
+    "ws": "^8.12.0"
   },
   "scripts": {
     "start": "node server.js",