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

Change-Id: I429e40c964278ddda80a37244605745ffbd95fbc
Reviewed-on: http://review.typo3.org/35541
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>