RTF increases support for Chinese reading

[lrjxgl]

I have updated the code about reader/rtf.php
`<?php
/**

• This file is part of PHPWord - A pure PHP library for reading and writing
• word processing documents.
• PHPWord is free software distributed under the terms of the GNU Lesser
• General Public License version 3 as published by the Free Software Foundation.
• For the full copyright and license information, please read the LICENSE
• file that was distributed with this source code. For the full list of
• contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
• @see https://github.com/PHPOffice/PHPWord
• @license http://www.gnu.org/licenses/lgpl.txt LGPL version 3
  */

namespace PhpOffice\PhpWord\Reader;

use Exception;
use PhpOffice\PhpWord\PhpWord;
use PhpOffice\PhpWord\Reader\RTF\Document;

/**

• RTF Reader class.
• @SInCE 0.11.0
  /
  class RTF extends AbstractReader implements ReaderInterface
  {
  /*

  • Loads PhpWord from file.

  • @param string $docFile

  • @return \PhpOffice\PhpWord\PhpWord
    */
    public function load($docFile)
    {
    $phpWord = new PhpWord();

    if ($this->canRead($docFile)) {

     $doc = new Document();
    
     $b1= file_get_contents($docFile);
      
     $b1=preg_replace_callback("/(\\\\'[\w]{2}\\\\'[\w]{2})/iUs",function($e){
     	 
     	$t=str_replace("\'","",$e[1]);
     	return iconv("gb2312","utf-8", pack('H*', strtoupper($t)));
     },$b1);
     $doc->rtf=$b1;
     $doc->read($phpWord);
    

    } else {
    throw new Exception("Cannot read {$docFile}.");
    }

    return $phpWord;
    }
    }
    `