feat: add missing ws options

Reference: https://github.com/websockets/ws/blob/master/doc/ws.md#new-websocketaddress-protocols-options

Related:

- https://github.com/socketio/engine.io-client/issues/574
- https://github.com/socketio/engine.io-client/issues/615

lib/util.js

@@ -1,6 +1,8 @@
 module.exports.pick = (obj, ...attr) => {
   return attr.reduce((acc, k) => {
-    acc[k] = obj[k];
+    if (obj.hasOwnProperty(k)) {
+      acc[k] = obj[k];
+    }
     return acc;
   }, {});
 };