[WIP] Fix tests

[andrewgsavage]

Made a start at getting tests working again.

• Closes Fixing the tests #52
• Executed pre-commit run --all-files with no errors
• The change is fully covered by automated unit tests
• Documented in docs/ as appropriate
• Added an entry to the CHANGES file

[hgrecco]

To run the linters, my suggestion is that you do:

$ pip install pre-commit
$ pre-commit install  # in the pint-pandas git folder
$ pre-commit run --all-files 

I have found that this much more reliable than using black/isort/flake from command line as we were doing this before.

[hgrecco]

I added a PR template!

[znicholls]

@andrewgsavage if you think this could be slow, would an easier first step be to just mark things as xfail then we work our way back through bit by bit in subsequent PRs? I'm just concerned that progress will be held up (e.g. my fiddling with pandas is_list_like in #59, I seem to have caught the attention of the pandas devs so am keen to capitalise) if we try and solve everything here (which could be hard).

[znicholls]

We can add 'closes #52' to the description right?

[andrewgsavage]

@andrewgsavage if you think this could be slow, would an easier first step be to just mark things as xfail then we work our way back through bit by bit in subsequent PRs? I'm just concerned that progress will be held up (e.g. my fiddling with pandas is_list_like in #59, I seem to have caught the attention of the pandas devs so am keen to capitalise) if we try and solve everything here (which could be hard).

Yea that's fair, some could take a while and I won't know till I try

[andrewgsavage]

@hgrecco this is ready, will get to the remaining tests in another PR

[hgrecco]

bors r+

[bors]

Configuration problem:
bors.toml: not found