title: Node globby error while using multi patterns
body: <p>I use node glob which is working OK .
  I use it for one folder1 like following</p>
  
  <pre><code>      glob('folder1/*.js'), function(err, files){
          if (err) {
              console.log('Not able to get files from folder: ', err);
          } else {
              files.forEach(function (file) {
  </code></pre>
  
  <p><a href="https://github.com/isaacs/node-glob" rel="nofollow">https://github.com/isaacs/node-glob</a></p>
  
  <p>Now I want to read in one shot from folder2 also and I try to use globby like following and I got error</p>
  
  <pre><code>    globby(['folder1/*.js','folder2/*.js']).then( function(err, files){
          if (err) {
              console.log('Not able to get files from folder: ', err);
          } else {
              //Get plugin configuration &amp; provided actions
              files.forEach(function (file) {
  </code></pre>
  
  <p><a href="https://github.com/sindresorhus/globby" rel="nofollow">https://github.com/sindresorhus/globby</a></p>
  
  <p>in this case the files are coming as <strong>undfiend</strong> and I got to the error  any idea why</p>