Use packaging optional deps instead of .txt in publishing workflow (#231

)

.github/workflows/python-publish.yml

@@ -56,7 +56,7 @@
 #       - name: Install dependencies
 #         run: |
 #           python -m pip install --upgrade pip
-#           pip install -r dev_requirements/requirements-packaging.txt
+#           pip install .[packaging]
 #       - name: Build wheel and source distributions
 #         run: |
 #           python -m build