title: Slick slider options change
body: <p>I'd like to know if there is any way to pass new options to already created Slick carousel?
  I have this code:</p>
  
  <pre><code>$('.bottom-slider').slick({
    asNavFor: '.top-slider',
    slidesToShow: 3,
    slidesToScroll: 1,
    variableWidth: true,
    centerMode: true,
    etc...
  });
  </code></pre>
  
  <p>and at some moment (added CSS class to restyle slider) I'd like to pass <code>slidesToShow: 5</code> to carousel. I tried with </p>
  
  <pre><code>$('.bottom-slider').slick({slidesToShow: 5}); 
  </code></pre>
  
  <p>but it doesn't work. Is it possible? I prefer not to destroy/run again slider or create second box with "restyled" carousel.</p>