adding gh action for pypi release

.github/workflows/pypi-release.yml

@@ -0,0 +1,29 @@
+name: Release to PyPI
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  release:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+    - name: Install Tools
+      run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel twine pypandoc
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Build and Publish
+      env:
+        TWINE_USERNAME: __token__
+        TWINE_PASSWORD: ${{ secrets.PYPI_TOKEN }}
+      run: |
+        python setup.py sdist bdist_wheel
+        twine upload dist/*