title: Slick Slider afterChange event: tell difference between autoplay and user interaction
body: <p>We have a bunch of Slick sliders on a site and want to do some Google Analytics event tracking on them.  We like the beforeChange/afterChange events because they encompass all gallery interactions (swiping, clicking prev/next arrows, clicking slide dots etc).  Unfortunately some of these galleries are set to autoplay, and I can't seem to find a property in the slick object or event returned from beforeChange/afterChange that differentiates between advancing via autoplay and advancing by a user.</p>
  <p>Does anyone know a property that would help make this determination?</p>