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

Change-Id: I25586f33151ac3cb3fa2e7a7f2c29fc9ecd0c7a6
Reviewed-on: http://review.typo3.org/35542
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>