Shrinking the size of the package release artifacts

[alxmrs]

Fixes #121.

Before:

du -h dist/*
107M    dist/google-weather-tools-0.2.1.tar.gz
 88K    dist/google_weather_tools-0.2.1-py3-none-any.whl

After:

du -h dist/*
 44K    dist/google-weather-tools-0.2.2.dev2+g2b5c4da.d20220325.tar.gz
 88K    dist/google_weather_tools-0.2.2.dev2+g2b5c4da.d20220325-py3-none-any.whl

[alxmrs]

Note: the wheel file has stayed the same due to an issue spoken about here: https://stackoverflow.com/a/61274968

pypa/setuptools_scm#190

[alxmrs]

After including config & documentation files, the dist folder looks like:

 du -h dist/*
 64K    dist/google-weather-tools-0.2.2.dev6+g9b3583e.tar.gz
 88K    dist/google_weather_tools-0.2.2.dev6+g9b3583e-py3-none-any.whl