Update GH workflow to push to pypi

.github/workflows/python-publish.yml

@@ -4,8 +4,8 @@
 name: Upload Python Package
 
 on:
-  release:
-    types: [created]
+    push:
+        branches: master
 
 jobs:
   deploy:
@@ -18,14 +18,13 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: '3.x'
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install setuptools wheel twine
     - name: Build and publish
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
       env:
         TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
         TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
       run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel twine
         python setup.py sdist bdist_wheel
         twine upload dist/*