Add deploy action

Author: cabarnes

.github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: Deploy
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  deploy:
+    name: Deploy to PyPI
+    if: startsWith(github.ref, 'refs/tags')
+    runs-on: ubuntu-latest
+    steps:
+    - name: Setup python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.8'
+
+    - name: Check out code
+      uses: actions/checkout@v3
+
+    - name: Build the library
+      env:
+        PYVER: ${{ matrix.version }}
+      run: python3 setup.py sdist
+
+    - uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        password: ${{ secrets.PYPI_API_TOKEN }}