[BUGFIX] Invalid dependency "typo3/cms" in composer.json

Change-Id: I69285ccfd4e49d22329feca5fb461e9f742242c5
Reviewed-on: http://review.typo3.org/35540
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>