2.2.1 post 2 release

This is a minor release with only a few fixes/changes. No API has changed and it is functionally equivalent to the 2.2.1 release.

What's Changed

• Show progress bar when uploading image by @exjobo in #15
• Small changes to the Makefiles to allow building the Sphinx docs and better cleanup
• Updated Python dependencies to get rid of dependency security vulnerability with urllib

New Contributors

• @exjobo made their first contribution in #15

Full Changelog: v2.2.1-update1...v2.2.1-post2