Scrutinizer Auto-Fixes

@maennchen requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/maennchen/ZipStream-PHP/inspections/8603ffde-fd7a-4c23-a1bb-76a7add12f9c

Enabled analysis tools:
 - PHP Analyzer
 - PHP PDepend
 - External Code Coverage
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer