[TASK] Update Fluid dependency to 2.5.2

This patch updates the Fluid dependency, to solve:

* Array keys now preserved when using reverse=1 on
   f:for - TYPO3/Fluid@227a05a
* TemplatePaths cache is made non-static -
   TYPO3/Fluid@fa1b8aa

Change-Id: Id10a80455f47300bfd29d734c83d9add87e17640
Releases: master, 8.7
Resolves: #84160
Reviewed-on: https://review.typo3.org/56031
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>