Patch release v0.13.1

Patch to fix upload_folder when passing path_in_repo=".". That was a breaking change compared to 0.12.1. Also added more validation around the path_in_repo attribute to improve UX.

• Fix path_in_repo validation when committing files by @Wauplin in #1382

Full Changelog: v0.13.0...v0.13.1