Additional minor updates in preparation for GitHub Action push

Author: brodriguez8774

Pipfile

@@ -43,6 +43,7 @@ sphinx-rtd-theme = "*"          # Additional Sphinx logic for building with stan
 # Project pypi dependencies.
 flit = "*"                      # Simple way to build and put Python packages on PyPI.
 twine = "*"                     # For pushing/publishing packages.
+tox = "*"                       # For automated testing after pushing.
 
 
 ###

pyproject.toml

@@ -1,7 +1,7 @@
 # Build properties for deployment.
 [build-system]
-requires = ['setuptools>=40.8.0', 'wheel']
-build-backend = 'setuptools.build_meta:__legacy__'
+requires = ["flit_core >=3.2,<4"]
+build-backend = "flit_core.buildapi"
 
 
 # region Core Project Settings and Metadata