title: Unexpected error when compiling reactjs-datepicker
body: <p>I'm using gulp for my project. I'm using reactjs-datepicker but the CSS files for the module is causing some trouble.</p>
  
  <p>I'm getting this error when running gulp.</p>
  
  <pre><code>C:\Work\Repos\Project\public\components\node_modules\react-datepicker\dist\react-datepicker.css:1
  .react-datepicker__tether-element-attached-top .react-datepicker__triangle, .react-datepicker__tether-element-attached-bottom .react-datepicker__triangle, .react-datepicker__year-read-view--down-arrow, .react-datepicker__month-read-view--down-arrow {
  ^
  ParseError: Unexpected token
  </code></pre>
  
  <p>Any ideas why?</p>
  
  <p>Thanks.</p>