CI: Fix staging releases through GitHub Actions

The GHA recipe did not manage to publish a release to PyPI. Because
everything works on the `crate` driver package, let's use the same
recipe here.

.github/workflows/main.yml

@@ -48,28 +48,3 @@ jobs:
 
       - name: Lint & test
         run: ./devtools/ci.sh 
-
-  pypi:
-    name: Build & publish package to pypi
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: 3.11
-
-      - name: Build package
-        run: |
-          python -m pip install twine wheel
-          python setup.py sdist bdist_wheel
-          twine check dist/*.tar.gz
-
-      - name: Publish package to PyPI
-        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@release/v1
-        with:
-          user: __token__
-          password: ${{ secrets.PYPI_API_TOKEN }}

.github/workflows/release.yml

@@ -0,0 +1,31 @@
+---
+name: release
+
+on: push
+
+jobs:
+  pypi:
+    name: Build & publish package to PyPI
+    runs-on: ubuntu-latest
+    if: startsWith(github.event.ref, 'refs/tags')
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: 'setup.py'
+
+      - name: Build package
+        run: |
+          python -m pip install build twine wheel
+          python -m build
+          twine check dist/{*.tar.gz,*.whl}
+
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}