fix(CourseCompleted): Corrects email in actor object.

Fixes #135 by merging PR #138.

lib/translator/src/Events/CourseCompleted.php

@@ -34,6 +34,7 @@ class CourseCompleted extends CourseViewed {
             'user_id' => $opts['relateduser']->id,
             'user_url' => $opts['relateduser']->url,
             'user_name' => $opts['relateduser']->fullname,
+            'user_email' => $opts['relateduser']->email,
         ])];
     }
 }