Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; PclZip has a deprecated constructor in .../vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/PCLZip/pclzip.lib.php on line 190
I would recommend just putting a dependency in to pclzip/pclzip instead of bundling your own version. The problem appears to have been solved upstream.
From php 7.1:
I would recommend just putting a dependency in to pclzip/pclzip instead of bundling your own version. The problem appears to have been solved upstream.