Tox to detect non-compliance w/dataframe library requirements #169
Description
Tox would allow us to figure out if tests truly rely on polars or pandas. For example, we could run the whole of CI w/Polars only and the whole of CI w/Pandas only. If one fails, we know there is a ghost dependency issue.
May solve issues like #132
Not exactly a priority but a good way of covering bases. Might have to get fancy with xfails and markers.