Scrutinizer Auto-Fixes

@solilokiam requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/solilokiam/asynceventdispatcher/inspections/a8077516-0ed7-4c83-a5d5-49163f45e8a8

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