[TASK] PHP 5.6 is supported

Resolves: #61680
Change-Id: If0004abe61434cdc376e9d8ca05c8f119280a46e
Reviewed-on: http://review.typo3.org/33232
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>