Set up test and sketch CI publish step

.github/workflows/package.yml

@@ -0,0 +1,43 @@
+name: package
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build SDist and wheel
+        run: pipx run build
+
+      - name: Check metadata
+        run: pipx run twine check dist/*
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: dist/*
+
+  upload_all:
+    name: Upload if release
+    needs: [build]
+    runs-on: ubuntu-latest
+    if: github.event_name == 'release' && github.event.action == 'published'
+    # Use the trusted publisher mechanism
+    # https://docs.pypi.org/trusted-publishers/creating-a-project-through-oidc/
+    permissions:
+      id-token: write
+
+    steps:
+      - uses: actions/setup-python@v4
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifact
+          path: dist
+
+      - name: Deploy to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1

pyproject.toml

@@ -17,3 +17,6 @@ classifiers = [
 [project.urls]
 "Homepage" = "https://github.com/nismod/irv-datapkg"
 "Bug Tracker" = "https://github.com/nismod/irv-datapkg/issues"
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]