Add CICD workflow to build, publish releases

.github/workflows/release-pypi.yaml

@@ -0,0 +1,31 @@
+name: PyPI Package Release
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
+          architecture: x64
+          cache: 'pip'
+          cache-dependency-path: 'requirements-dev.txt'
+      - name: Install dependencies
+        run: |
+          pip install -r requirements-dev.txt
+      - name: Build and publish release
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          python -m build
+          twine upload dist/*

requirements-dev.txt

@@ -1,4 +1,5 @@
 black
+build
 flake8
 intake_esm
 pytest