[TASK] Raise version to 2.2.0

Change-Id: Ib3512e7ae3dcff06fe5e72cf7180292cf39c3cac
Reviewed-on: http://review.typo3.org/35053
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>