Fix phpexcel 1.8.1 to support php7.4
Source: https://github.com/PHPOffice/PHPExcel
- PHPExcel
- Copyright (c) 2006 - 2014 PHPExcel
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
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- Lesser General Public License for more details.
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- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
- @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
- @version ##VERSION##, ##DATE##