title: can't watch multiple files with json-server
body: <p>I've read about <a href="https://github.com/typicode/json-server" rel="noreferrer">Fake json-server</a> and I'd like to watch more than 1 file.
  In the instructions it is listed</p>
  
  <blockquote>
    <p>--watch, -w<br>
    Watch file(s)</p>
  </blockquote>
  
  <p>but I'm not able to make it working if I launch it as</p>
  
  <pre><code>json-server -w one.json two.json more.json
  </code></pre>