[TASK] Raise version number in bower and package json files

Raise the dev version to 8.1.0-dev in bower and package json files.

Resolves: #75738
Releases: master
Change-Id: I68151d0372a7505ef02132467fd0fe76c032705b
Reviewed-on: https://review.typo3.org/47745


Reviewed-by: Christoph Kratz <ckr@rtp.ch>
Tested-by: Christoph Kratz <ckr@rtp.ch>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>