update GitHub actions to install optional dependencies when installing pygambit instead of using requirements.txt

Author: edwardchalstrey1

.github/workflows/python.yml

@@ -22,15 +22,13 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install setuptools build cython wheel
-          pip install -r tests/requirements.txt
-          pip install -r doc/requirements.txt
       - name: Build source distribution
         run:
           python -m build
       - name: Build from source distribution
         run: |
           cd dist
-          pip install -v pygambit*.tar.gz
+          pip install -v "pygambit[test,doc] @ pygambit*.tar.gz"
       - name: Run tests
         run: pytest --run-tutorials
 
@@ -51,11 +49,9 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install setuptools build cython wheel
-          pip install -r tests/requirements.txt
-          pip install -r doc/requirements.txt
       - name: Build extension
         run: |
-          python -m pip install -v .
+          python -m pip install -v .[test,doc]
       - name: Run tests
         run: pytest --run-tutorials
 
@@ -76,11 +72,9 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install setuptools build cython wheel
-          pip install -r tests/requirements.txt
-          pip install -r doc/requirements.txt
       - name: Build extension
         run: |
-          python -m pip install -v .
+          python -m pip install -v .[test,doc]
       - name: Run tests
         run: pytest --run-tutorials
 
@@ -101,10 +95,8 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install setuptools build cython wheel
-          pip install -r tests/requirements.txt
-          pip install -r doc/requirements.txt
       - name: Build extension
         run: |
-          python -m pip install -v .
+          python -m pip install -v .[test,doc]
       - name: Run tests
         run: pytest --run-tutorials