No issue - Add publishing action

.github/workflows/publish_to_pypi.yml

@@ -0,0 +1,37 @@
+name: Publish to PyPi
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.8'
+    - name: Install dependencies
+      run: |
+        pip install --upgrade -e .[test]
+    - name: Run tests
+      run: |
+        pytest
+    - name: Build package
+      run: |
+        python setup.py sdist
+    - name: Publish package to TestPyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        user: __token__
+        password: ${{ secrets.test_pypi_password }}
+        repository_url: https://test.pypi.org/legacy/
+    - name: Publish package to PyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        user: __token__
+        password: ${{ secrets.pypi_password }}