title: Chart.js timescale: set min and max on xAxes
body: <p>How can I set a min and max on the <code>xAxes</code>? It works fine on the <code>yAxes</code> but on the <code>xAxes</code> it shows no behavior.</p>
  
  <p>My <code>xAxes</code> is using the <code>type: 'time'</code>. My labels for the <code>xAxis</code> are using the <code>moment</code> object aswell. But it also does not work when I remove the type time and use normal digits. I am using the Chart.js version 2.2.2.</p>
  
  <pre><code>scales: {
     yAxes: [{
        ticks: {
           beginAtZero:false,
        }
     }],
     xAxes: [{
        type: 'time',
        ticks: {
           min: moment(1471174953000),
           max: moment(1473853353000)
        }   
     }]
  }
  </code></pre>
  
  <p><a href="http://www.chartjs.org/docs/#scales-time-units" rel="noreferrer">Here is the chart.js Time Scale documentation.</a></p>