.github/workflows/pythonpublish.yml: Use 'build' instead of calling setup.py directly

Author: mkoeppe

.github/workflows/pythonpublish.yml

@@ -17,12 +17,12 @@ jobs:
         python-version: '3.x'
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        python3 -m pip install --upgrade pip
+        python3 -m pip install build twine
     - name: Build and publish
       env:
         TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
         TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
       run: |
-        python setup.py sdist bdist_wheel
+        python3 -m build
         twine upload dist/*