Added yuri command

bot.js

@@ -251,7 +251,10 @@ client.on('message', message => {
                 break;
             case 'yaoi':
                 message.channel.send(imgurRequest('yaoi', 5));
-                break;            
+                break;    
+            case 'yuri':
+                message.channel.send(imgurRequest('yuri', 5));
+                break;          
         }
 
     }