title: LineSeries setHighlightOnHover, onHover, onMouseClick doesn't work
body: <p>On LightningtChartJS, I added 2 LineSeries which displays correctly (screenshot).
  <a href="https://i.stack.imgur.com/o0Wjy.png" rel="nofollow noreferrer">sample line graph</a></p>
  <p>Then I am trying to do the highlighting of the lines on hover, plus the hover and mouseclick events.</p>
  <p>I set the following:</p>
  <pre><code>const series=this.chart.addLineSeries({});
  series.add(data); //data var is set above this code
  
  series.setHighlightOnHover(true);
      
  series.onHover((...args)=&gt;{
     console.log(args);
  });
  series.onMouseClick((...args)=&gt;{
     console.log(args);
  }); 
  </code></pre>
  <p>The the highlight doesn't work, hover and click events don't trigger when I hover or click on a any of the lines.</p>
  <p>Please help.</p>