Scrutinizer Auto-Fixes

@Metabor requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/Metabor/Statemachine/inspections/e6bf0afb-2da7-4964-a3f9-a468ac5da800

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