Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/acquia/hmac-request/inspections/bb8a1438-2c5c-463e-affb-6c303e574809

Enabled analysis tools:
 - PHP Analyzer
 - PHP Mess Detector
 - PHP CS Fixer
 - PHP PDepend
 - External Code Coverage
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer
Removed accidental @return
Merge pull request #14 from cpliakas/scrutinizer-patch-1

Scrutinizer Auto-Fixes