[TASK] Upgrade vfsStream from 1.4.0 to 1.6.0

Update via composer.

Change-Id: Ia9c02d32feac2b3f870ca5560bcf0cede0a0aea0
Resolves: #71109
Releases: master
Reviewed-on: https://review.typo3.org/44340


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>