fix: prototype vulnerability in socket.io onMessage

src/socket.io/index.js

@@ -13,7 +13,7 @@ const logger = require('../logger');
 const plugins = require('../plugins');
 const ratelimit = require('../middleware/ratelimit');
 
-const Namespaces = {};
+const Namespaces = Object.create(null);
 
 const Sockets = module.exports;