Use micromamba in CI

[mattwthompson]

Description

Miniconda is slow, micromamba is a bit less slow.

Todos

Notable points that this PR has either accomplished or will accomplish.

• [x] See if a channel priority option needs to be passed through

Questions

• [ ] Question1

Status

• [ ] Ready to go

[codecov[bot]]

Codecov Report

Merging #205 (f129104) into main (e4d5add) will not change coverage. The diff coverage is n/a.

Additional details and impacted files

[mattwthompson]

Thanks!

[mattwthompson]

This is a part of #204 but I think it's useful to merge separately since CI might not be passing without it. Merging and re-kicking #206 🤞