Update unit test action to pyproject.toml and pytest format

.github/workflows/python_testing.yml

@@ -10,22 +10,18 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        python -m pip install nose
-        pip install -r requirements.txt
-    - name: Build package
-      run: |
-        python setup.py build
+        python -m pip install .
+        pip install pytest
     - name: Run unit tests
       run: |
-        nosetests -v
+        python -m pytest --pyargs dfols