The fuzzy version of dependencies:

1. pyjanitor requires the minimal python version is 3.6, but the python version in testing env is 3.9
2. pyanitor requires pandas 1.4.1 (in .requirements/base.txt), but pandas 1.4.1 requires minimal the python version is 3.8
3. The CI only test the specific version of dependencies.

Maybe we could set a series of envs to test pyjanitor

• 310-minimal: minimal version of dependencies under python 3.10, with '==` fixed version
• 39-minimal: minimal version of dependencies under python 3.9
• 38-minimal: minimal version of dependencies under python 3.8
• latest: latest version of dependencies with python from 3.8 to 3.10 without '=='

Originally posted by @Zeroto521 in #1116 (comment)