Update changelog.

_includes/changelog.html

@@ -1,5 +1,7 @@
 <h2>Changes<a href="#changelog"></a></h2>
 <ul>
+  <li><code>v4.2.0</code> 5/9/17 - Replace <code>webpack</code> build with <code>rollup</code>. Replace <code>jshint</code> and <code>jscs</code> with <code>eslint</code>.</li>
+  <li><code>v4.1.1</code> 3/21/17 - the <code>before</code> styles for a <code>ShuffleItem</code> were not applied if the item didn&rsquo;t move.</li>
   <li><code>v4.1.0</code> 1/30/17 - Use webpack-2 to bundle Shuffle.</li>
   <li><code>v4.0.2</code> 9/15/16 - Update <code>custom-event-polyfill</code> dependency.</li>
   <li><code>v4.0.1</code> 7/30/16 - Fix <code>delimeter</code> option.</li>