User can Chose Aspect Ratio of Image while Croping

Hi,
Thanks for the great lib.
I just want to know is it possible that the user can choose between oval, rectangle or square and also the aspect ratio can be changed when the user is cropping the image?

The issue does not name any files, tests, or entry points. Begin by reviewing the library's existing crop configuration and UI behavior, then determine the scope for user-selectable oval, rectangle, square, and variable aspect-ratio cropping; done means the requested choices work during image cropping and are covered by appropriate tests.

Written by the indexing model from the issue text.