Github ci for publishing releases (#101)

.github/workflows/upload-pypi.yml

@@ -0,0 +1,27 @@
+name: Publish Python on TestPyPI and pypi
+
+on:
+  push:
+    tags:
+      - '/^v\d+\.\d+\.\d+(-\S+)?$/'
+
+jobs:
+  build-n-publish:
+    name: Build and publish on TestPyPI
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Build a source tarball
+        run:
+            python setup.py sdist
+      - name: Publish distribution package to Test PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: __token__
+          password: ${{ secrets.TESTPYPI_TOKEN_PASSWORD}}
+          repository_url: https://test.pypi.org/legacy/