adding github publish action

.github/actions/tests.yml

@@ -0,0 +1,23 @@
+name: continuous-integration
+
+on: [push, pull_request]
+
+jobs:
+
+  publish:
+
+    name: Publish to PyPi
+    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v2
+      - name: Build package
+        run: |
+          pip install wheel
+          python setup.py sdist bdist_wheel
+      - name: Publish
+        uses: pypa/gh-action-pypi-publish@v1.1.0
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_KEY }}