title: Unable to change directory via concurrently in npm script
body: <p>I have a website and couple of external modules added as local node dependencies (using <code>"file:..."</code>). </p>
  
  <p>To update the external module references in my website, I am using npm scripts like below:</p>
  
  <pre><code>"scripts": {
      "preupdate-own-deps":"concurrently \"cd ../my-ext-module1 &amp;&amp; gulp build\" \"cd ../my-ext-module2 &amp;&amp; gulp build\"",
      "update-own-deps": "rimraf node_modules/my-ext-* &amp;&amp; npm install --save"
  }
  </code></pre>
  
  <p>Whenever I run <code>concurrently "cd ../my-ext-module1 &amp;&amp; gulp build" "cd ../my-ext-module2 &amp;&amp; gulp build"</code> in terminal everything is fine. But whenever the same is run using <code>npm run update-own-deps</code>, the <code>preupdate-own-deps</code> exits with following error:</p>
  
  <pre><code>
  [0] The system cannot find the path specified.
  [1] The system cannot find the path specified.
  [1] cd ../my-ext-module2 && gulp build exited with code 1
  [0] cd ../my-ext-module1 && gulp build exited with code 1
  </code></pre>
  
  <p>As I am new to npm scripts, I am not sure what am I missing here. Please suggest.</p>
  
  <p><strong>Update:</strong> Stupid me, was using an old version of concurrently. Updating sorted the issue.</p>