[TASK] Update autosize to 3.0.20

v.3.0.20 - 2016-12-04
Fixed minor bug where the resized event would not fire under specific
conditions when changing the overflow.

v.3.0.19 - 2016-11-23
Bubble dispatched events. Merged #319.

Resolves: #78962
Releases: master
Change-Id: I998cff2bf46e14e73abbdf6729d39146b562f8a2
Reviewed-on: https://review.typo3.org/50935


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>