title: Highcharts does not work with wicked_pdf
body: <p>I'm trying to generate a PDF report using the Wicked_pdf gem and Highcharts.
  I've already tried to set <code>animation</code>, <code>enableMouseTracking</code> and <code>shadow</code> false.
  But when wkhtmltopdf tries to generated the PDF files I got an error. </p>
  
  <p>I really don't not what to do, because when I do the same procedure for an HTML, Highcharts renders perfectly.</p>