zoomToValues fix

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script nonce="undefined" src="https://cdn.zingchart.com/zingchart.min.js"></script>
  <style></style>
</head>

<body>
  <div id='myChart'></div>
  <script>
    ZC.LICENSE = ["569d52cefae586f634c54f86dc99e6a9", "b55b025e438fa8a98e32482b5f768ff5"];
    var myConfig = {
      type: "bar",
      legend: {

      },
      scrollX: {},
      scaleX: {
        zooming: true,
        zoomToValues: [2, 5]
      },
      series: [{
        values: [35, 42, 67, 89, 25, 34, 67, 85]
      }]
    };

    zingchart.render({
      id: 'myChart',
      data: myConfig,
      height: 400,
      width: 600
    });
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script src="https://cdn.zingchart.com/zingchart.min.js"></script>
</head>

<body>
  <div id='myChart'></div>
</body>

</html>

var myConfig = {
  type: "bar",
  legend: {

  },
  scrollX: {},
  scaleX: {
    zooming: true,
    zoomToValues: [2, 5]
  },
  series: [{
    values: [35, 42, 67, 89, 25, 34, 67, 85]
  }]
};

zingchart.render({
  id: 'myChart',
  data: myConfig,
  height: 400,
  width: 600
});