add workflow to upload to pypi

.github/workflows/pypi.yml

@@ -0,0 +1,41 @@
+name: Upload to PyPI
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow when a release is created
+  release:
+    types: [created]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "testpypi"
+  testpypi:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # Sets up python3
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: "Installs dependencies"
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install setuptools wheel twine
+
+      # Upload to TestPyPI
+      - name: Build and upload to PyPI
+        run: |
+          python3 setup.py sdist bdist_wheel
+          python3 -m twine upload dist/*
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.TWINE_TOKEN }}