Version changes

0.7.3 (2022-05-17)

lock python version to ">=3.7.13" and pandas version to ">=1.3.5" for Google Colab compatibility

0.7.2 (2022-05-16)

switched from requests to httpx
disabled Sphinx and streamlit dependencies in pyproject.toml
above allows quicker update of poetry dependencies

0.7.1 (2022-05-16)

added latest confirmed release date to README, it is now 2022-04
all releases 2007-01 to 2022-04 are downloadable
added just command to create readme.py and run from README.md

0.7.0 (2020-10-16)

Fixes the url for Oct 2021 release - thanks @jm-rivera.
Simplified code for url creation.

0.6.4 (2021-09-01)

Changed matplotlib version to less restrictive and added matplotlib to development dependencies - as it used directly only in examples, not in weo package itself (unless with pandas). Closes #23.