New installation procedure for Mac, modern conda

[zacsimile]

Python 3.7 has been removed from the Anaconda packages repository. As such, we experience the following issue during installation

(base) zachcm@eduroam-077-080-114-111 expansion-analysis % conda create --name psfinv python=3.7.10
Retrieving notices: ...working... done
Collecting package metadata (current_repodata.json): done
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - python=3.7.10

To remedy this, I currently bump to Python 3.9. However, this comes with a variety of packaging issues for this repository. Here is how to get it to install.

1. Remove the pinned versions of tensorflow and tensorflow-probability and pin numpy to version <2. That is, change

"numpy",
...
"tensorflow==2.9.1",
"tensorflow-probability==0.17",

to

"numpy<2",
...
"tensorflow",
"tensorflow-probability",

2. Run

mamba env create --name psfinv python=3.9
conda activate psfinv
pip install "cython<3"
pip install "pyyaml==5.4.1" --no-build-isolation
pip install -e .
pip install tf-keras