Docblock updated.

src/Event/EventDispatcherTrait.php

@@ -9,13 +9,13 @@
  *
  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  * @link          http://cakephp.org CakePHP(tm) Project
- * @since         3.0.0
+ * @since         3.0.10
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
 namespace Cake\Event;
 
 /**
- * Provides the event manager interface features for usage in classes that require it.
+ * Implements EventDispatcherInterface.
  *
  */
 trait EventDispatcherTrait