Philippe Court authored Dec 16, 2017 and Christian Kuhn committed Dec 17, 2017

change TYPO3 version in INSTALL.md to v9

Releases: master
Resolves: #83368
Change-Id: I422449e7a114cc698b7fab73bbae70f5ebab8116
Reviewed-on: https://review.typo3.org/55132


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>