Scrutinizer Auto-Fixes

@WyriHaximus requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/WyriHaximus/ReactGuzzle/inspections/f1e09372-f5d2-4611-b737-3a2288eec778

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