Actions workflow for PyPI publication

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

@@ -0,0 +1,40 @@
+name: Publish to PyPI
+
+on: 
+  release:
+    types: [published]
+
+jobs:
+  build-n-publish:
+    name: Build and publish
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.9
+      - name: Install dependencies
+        run: >-
+          python -m
+          pip install -r
+          requirements.txt
+      - name: Install pypa/build
+        run: >-
+          python -m
+          pip install
+          build
+          --user
+      - name: Build a binary wheel and a source tarball
+        run: >-
+          python -m
+          build
+          --sdist
+          --wheel
+          --outdir dist/
+          .
+      - name: Publish to Test PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+          repository_url: https://test.pypi.org/legacy/