Initial package setup

[rth]

Mostly boilerplate code to set up the package adapted from pytest-pyodide, matplotlib-pyodide etc.

[rth]

It does look like we have some misconfiguration for pre-commit, because it does find things to fix in code I copy-paster from the Pyodide repo. Where pre-commit should have been running on them (well at least for tests/test_micropip.py). And I think I saw that for matplotlib-pyodide as well.

[hoodmane]

I think @henryiii specifically excluded the externals directory based on the idea that we didn't want to change code copied out of other projects.

[rth]

Yeah but for instance, in 851b14b triggered by pre-comit there is a linter change in micropip/_micropip.py and in tests/test_micropip.py. So it's not just externals. With a monorepo it's hard to make sure that path regexes are correct everywhere, because there are so many things...

[hoodmane]

Probably would be good to revert the changes to the externals directory.

[rth]

I did in earlier commits..

[hoodmane]

I did in earlier commits..

Sorry!

Recently I have also been getting the following error:

/home/hood/.cache/pre-commit/repow1xom7p_/py_env-3.10/lib/python3.10/site-packages/numpy/__init__.pyi:636: error:
Positional-only parameters are only supported in Python 3.8 and greater  [syntax]