[TASK] Update phpunit to version 5.7.5

Change-Id: I118f4d6b9fd94fcaa0da3cef4e0f290b60c57fc8
Resolves: #79460
Releases: master
Reviewed-on: https://review.typo3.org/51420


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>