Add workflow to build and push to PyPI

.github/workflows/publish.yml

@@ -0,0 +1,35 @@
+name: Publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+
+on: push
+
+jobs:
+  build-n-publish:
+    name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@master
+    - uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+
+    - name: Install pep517 and twine
+      run: python -m pip install pep517 twine
+    - name: Build package
+      run: python -m pep517.build --source --binary .
+    - name: List result
+      run: ls -l dist
+    - name: Check long_description
+      run: python -m twine check dist/*
+
+    - name: Publish distribution 📦 to Test PyPI
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.test_pypi_password }}
+        repository_url: https://test.pypi.org/legacy/
+
+    - name: Publish distribution 📦 to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.pypi_password }}