The php-cs fixer creates a cache file which
should not be commited. Add it to the .gitgnore to avoid
any mistakes.

Resolves: #79510
Releases: master, 7.6
Change-Id: Ia85f825416ad767a07d280de35a18c318e1a5133
Reviewed-on: https://review.typo3.org/51441


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Tested-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>