Update CKEditor to the lastest version that fixes a lot of bugs.

Release notes:
https://ckeditor.com/cke4/release-notes
https://ckeditor.com/cke4/release/CKEditor-4.7.3
https://ckeditor.com/cke4/release/CKEditor-4.8.0
https://ckeditor.com/cke4/release/CKEditor-4.9.0
https://ckeditor.com/cke4/release/CKEditor-4.9.1

@types/ckeditor has also been updated

Following commands were used to update dependencies:
- yarn add ckeditor@4.9.1 -E -D
- yarn add @types/ckeditor@0.0.46 -E -D

Resolves: #84565
Releases: master
Change-Id: I47f81e1ecafb06770e18ac83cbe2a15e904623dd
Reviewed-on: https://review.typo3.org/56488


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>