Echo JS 0.11.0

Hi, I'm the author of the article. I've added an exmaple about the worker_threads module to the article.

My idea on the article was to focus more on the "why" we need this new module, more than the "how" we can use it, because the docs already have examples and at the same time is experimental, so it is subject to change and the example in the future could not work. But you are right, an example was needed.

I hope you enjoy it. Thanks for the feedback.