title: Radar Chart Not working in React Highcharts
body: <p><a href="https://i.stack.imgur.com/VZ1K3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VZ1K3.png" alt="enter image description here" /></a>I want to render the radar chart using react high charts,
  But after writing below code, i am getting the line chart format not exactly the expected output i am achieving, Which i am trying to get the chart in radar format.</p>
  <pre><code>  {
                  
              chart: {
                  renderTo: 'container',
                  polar: true,
                  type: 'line'
              },
              credits: {
                  enabled: false
              },
              
              title: {
                  text: '',
                 
              },
              xAxis: {
                  categories: ['Sales', 'Marketing', 'Development', 'Customer Support', 
                          'Information Technology', 'Administration'],
              },
                  
              yAxis: {
                  gridLineInterpolation: 'polygon',
                  lineWidth: 0,
                  min: 0
              },
              series: [{
                  name: 'Allocated Budget',
                  data: [43000, 19000, 60000, 35000, 17000, 10000],
                  pointPlacement: 'on'
              }, {
                  name: 'Actual Spending',
                  data: [50000, 39000, 42000, 31000, 26000, 14000],
                  pointPlacement: 'on'
              }]
          
          }
  </code></pre>
  <p>Component</p>
  <pre><code>&lt;ReactHighcharts config={radar}&gt;&lt;/ReactHighcharts&gt;
  </code></pre>
  <p>Import</p>
  <pre><code>import ReactHighcharts from 'react-highcharts';
  </code></pre>
  <p>I am unable to render in radar type, Instead getting similar to line chart
  <a href="https://i.stack.imgur.com/VZ1K3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VZ1K3.png" alt="I am unable to render in radar type, Instead getting similar to line chart" /></a></p>
  <p><a href="https://i.stack.imgur.com/rT2J3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rT2J3.png" alt="enter image description here" /></a></p>