added GitHub worflow to automatically release on pypi

.github/workflows/pip-upload.yml

@@ -0,0 +1,32 @@
+name: Upload to PIP
+
+on:
+  # trigger the workflow when a release is created
+  release: 
+    types: [created]
+  workflow_dispatch:
+
+jobs:
+  upload:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: "Installs dependencies"
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install setuptools wheel twine
+
+      - name: "Builds and uploads to PyPI"
+        run: |
+          python setup.py sdist bdist_wheel
+          python -m twine upload dist/*
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.TWINE_TOKEN }}