add Github workflow for publishing package

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+name: Publish
+on: [push]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.8
+    - name: Create distribution package
+      run: make dist
+    - name: Publish distribution package 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 package to PyPI
+      if: startsWith(github.event.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.pypi_password }}