PHPexcel version very old and lacking functionality

It continues facilitating the version 1.7.5 of PHPexcel when the last one for years is 1.8.1.
It is difficult to use this component in other solutions in our applications.

• @category PHPExcel
  
• @package PHPExcel
  
• @copyright Copyright (c) 2006 - 2010 PHPExcel (http://www.codeplex.com/PHPExcel)
  
• @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
  
• @version 1.7.5, 2010-12-10