title: Horizontal stepper animation
body: <p>tell me how to change the standard transition animation for MatHorizontalStepper component.</p>
  
  <p>i try use</p>
  
  <pre><code>animations: [
  trigger('verticalStepTransition', [
    state('previous', style({height: '0px', visibility: 'hidden'})),
    state('next', style({height: '120px', visibility: 'hidden'})),
    state('current', style({height: '*', visibility: 'visible'})),
    transition('* &lt;=&gt; current', animate('.3s'))
  ])
  </code></pre>
  
  <p>but nothing changes</p>
  
  <p>Maybe I should change something in the template, but where</p>