Create PubSub Design Pattern In Javasript article

Hello! I've written [the article we talked about](https://github.com/operasoftware/devopera/issues/120) in the issues. Any feedback is appreciated.

Cheers!
This whole section is confusing, since what jQuery uses internally are not proper Promises (as per ES6). https://thewayofcode.wordpress.com/tag/jquery-deferred-broken/