title: node: bad option: --experimental-worker
body: <p>I am trying to experiment with worker_threads in <code>node.js</code>.</p>
  
  <pre><code>const { Worker, isMainThread, parentPort } = require('worker_threads');
  if (isMainThread) {
      // This code is executed in the main thread and not in the worker.
  
      // Create the worker.
      const worker = new Worker(__filename);
      // Listen for messages from the worker and print them.
      worker.on('message', (msg) =&gt; { console.log(msg); });
  } else {
      // This code is executed in the worker and not in the main thread.
  
      // Send a message to the main thread.
      parentPort.postMessage('Hello world!');
  }
  </code></pre>
  
  <p>I save the above code in <code>index.js</code> and run <code>node  --experimental-worker index.js</code> on terminal. 
  I get the following error:</p>
  
  <blockquote>
    <p>node: bad option: --experimental-worker.</p>
  </blockquote>
  
  <p>I have <code>v8.16.0</code> of node installed in my mac.</p>