Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/thephpleague/flysystem/inspections/dd6f5eb6-f719-420b-867e-764cd4ea9438

Enabled analysis tools:
 - PHP Analyzer
 - PHP Change Tracking Analyzer
 - PHP PDepend
Merge pull request #316 from FrenkyNet/scrutinizer-patch-1

Scrutinizer Auto-Fixes