title: Wkhtmltopdf + Highcart export issue
body: <p>I've applied following things in my code.</p>
  <p>For chart : Used highchart library.</p>
  <p>For PDF export : Use wkhtmltopdf in laravel.</p>
  <p>Till date i can export chart into pdf but yesterday ( 3rd feb 2021 ) not able to export chart into pdf. (only Charts are missed)</p>
  <pre><code>Function.prototype.bind = Function.prototype.bind || function (thisp) {
      var fn = this;
      return function () {
         return fn.apply(thisp, arguments);
      };
  };
  </code></pre>
  <p>Above code added to pdf export view file and it works but now not works is there any idea?</p>