[TASK] Apply rector set php56

    php bin/rector process

Releases: master
Resolves: #89807
Change-Id: I667199693dc519d0353d8e10b40d86faf1cf946a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62448


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>