Bugfix release:
- make cropVariant configurable
- dont process svg files in FilesUtility
- allow to remove data by processingConfiguration flag
- only modify lastTypolinkUrl when EXT:Headless is really used (!)
- also, we moved from travis CI to github actions (thanks @sabbelasichon)

Thanks goes to:
@sabbelasichon
@twoldanski
@theLine
@subjacked