Docker-image-size-limit

Features

- Adds Github Action support
- Adds `python3.8` support
- Adds `Dockerfile` and dockerhub integration

Misc

- Updates `poetry` version
- Updates lots of dependencies

Features

- Now real negative size is returned when limit is bigger than image
- Adds `py.typed` file to package the type annotation with the code

Misc

- Updates `wemake-python-styleguide`
- Uses `nitpick`
- Adds more docs

- Initial release