Scrutinizer Auto-Fixes

@Spomky requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/Spomky-Labs/oauth2-interface/inspections/7555154f-cc98-4eaf-b7a7-a334b0edb26a

Enabled analysis tools:
 - PHP Analyzer
 - PHP PDepend
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer