[TASK] Set TYPO3 version to 7.2.0-dev

Releases: master
Change-Id: I901675473bf00227e94c51edca5c2df065627a41
Reviewed-on: http://review.typo3.org/37170


Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>