Report coverage to Codecov

[jakirkham]

Setup coverage reporting with Codecov.

TODO:

• Unit tests and/or doctests in docstrings
• Tests pass locally
• Docstrings and API docs for any new/modified user-facing classes and functions
• Changes documented in docs/release.rst
• Docs build locally
• GitHub Actions CI passes
• Test coverage to 100% (Coveralls passes)

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@6facbba). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #386   +/-   ##
=======================================
  Coverage        ?   99.57%           
=======================================
  Files           ?       54           
  Lines           ?     2099           
  Branches        ?        0           
=======================================
  Hits            ?     2090           
  Misses          ?        9           
  Partials        ?        0           

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[joshmoore]

Hmmm....something's gone wrong with the tests here.

[jakirkham]

Yeah they ran, but the status wasn't reported in the PR. Not sure what is up there. Let's try again 🍀

[jakirkham]

Seems to be working. Going to get this in so we can start collecting coverage data. Happy to follow up on anything after.