title: Laravel mix version a specific file
body: <p>I am trying to version a specific file.</p>
  
  <pre><code>mix.js('resources/assets/js/app.js', 'public/js')
    .sass('resources/assets/sass/app.scss', 'public/css')
    .babel([
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js',
      'resources/assets/js/libs/xxxx.js'
    ], 'public/js/libs.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .scripts('resources/assets/js/pages/xxxx.js', 'public/js/xxxx.js')
    .version([
      'public/js/app.js'
    ]);
  </code></pre>
  
  <p>I am trying to version app.js but I get the error:
  <strong>Error: ENOENT: no such file or directory, open 'public/js/app.js'</strong></p>
  
  <p>I have also tried: <code>app.*.js</code></p>