Scrutinizer Auto-Fixes

@matejvelikonja requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/matejvelikonja/attendee/inspections/56c53f8d-1245-4942-a8f7-ccdf3b96337c

Enabled analysis tools:
 - PHP Analyzer
 - PHP Code Sniffer
 - PHP CS Fixer
 - PHP Copy/Paste Detector
 - External Code Coverage