title: Annotations work with HighStock but not with Highcharts
body: <p>My HTML code begins with:</p>
  <pre><code>&lt;!DOCTYPE HTML&gt;
  &lt;html&gt;
      &lt;script src=&quot;file:///[%sPath_ext%]jquery-3.4.1.min.js&quot;&gt;&lt;/script&gt;
      &lt;script src=&quot;file:///[%sPath_hc%]highstock.js&quot;&gt;&lt;/script&gt;
      &lt;script src=&quot;file:///[%sPath_hc%]annotations.js&quot;&gt;&lt;/script&gt;
      &lt;script src=&quot;file:///[%sPath_hc%]dark-unica.js&quot;&gt;&lt;/script&gt;
  </code></pre>
  <p>and it works perfectly.
  Now I thought that Highstock was necessary to use the chartarea.addAnnotation() method, but when I read the doc, I realize that Annotation module can be used also with Highcharts.
  As I don't use any other specific function from Highstock, I try to use Highcharts instead.</p>
  <p>But when I change the reference 'highstock.js' into 'highcharts'.js, I get a jquery script error!
  Why?</p>