Add Github workflow for build & publish

Author: foosel

.github/workflows/publish-to-test-pypi.yml

@@ -0,0 +1,21 @@
+name: 🔨 Build and 📦 publish distribution to TestPyPI
+on: push
+
+jobs:
+  build-n-publish:
+    name: 🔨 Build and 📦 publish distribution to TestPyPI
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.7
+      - name: 🔨 Build a binary wheel and a source tarball
+        run: >-
+          python setup.py sdist bdist_wheel
+      - name: 📦 Publish to TestPyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.testpypi_password }}
+          repository_url: https://test.pypi.org/legacy/