update setup-miniconda

[jGaboardi]

• update setup-miniconda from goanpeca/setup-miniconda@v1 to conda-incubator/setup-miniconda@v2

[jGaboardi]

Not sure what's causing this error here:

E   ModuleNotFoundError: No module named 'tobler'

The actions/checkout@v2 action sets up an environment based on the repo, tobler in this case (see spaghetti, libpysal, etc.). Therefore, there is no need for the following, which is removed in this PR:

- shell: bash -l {0}
  run: pip install -e . --no-deps --force-reinstall

However, the error above gets thrown now. @knaaptime What are your thoughts on this?