Add option to customize ribbon gravity

[akaita]

The ribbon always goes on the top-left.
Should be able to put it on the top-right, bottom-left and bottom-right.

[ka05]

I've added the ability to put the ribbon horizontally on the top or bottom as an alternative. Started working on the top-right, bottom-left and bottom-right but abandoned changes for now since I dont have time. Will be creating a PR with horiz top and bottom soon.

[ka05]

FYI I created a PR for this and it is awaiting approval. #27

[akaita]

v1.3.0 is now published and supports these gravities: top, bottom, topRight, topLeft. @ka05 thanks for your help 👍 .

I'll keep this issue open so I at least add bottomRight and BottomLeft (I can see the use case for those)