title: Semantic UI accordion behaviors not working
body: <p>I'm trying to utilize the semantic ui accordion behavior to open and close accordions based on a button click, however this is not functioning as I would expect.</p>
  
  <p>From the documentation:</p>
  
  <pre><code>$('.ui.accordion').accordion('behavior', argumentOne, argumentTwo...);
  </code></pre>
  
  <p>I am attempting to utilize the <code>toggle (index)</code> behavior. My expectation is</p>
  
  <pre><code>$('.ui.accordion').accordion('toggle', 1);
  </code></pre>
  
  <p>Would open the accordion at index 1 on the page and close the others, but adding that behavior event to a click event on a button does not toggle any accordion.</p>
  
  <p>CodePen of the issue here <a href="https://codepen.io/jasonyost/pen/ZxOvPW" rel="nofollow noreferrer">https://codepen.io/jasonyost/pen/ZxOvPW</a></p>