Add workflow for automatic PyPI publishing

.github/workflows/upload_pypi.yml

@@ -0,0 +1,50 @@
+name: Package and upload to PyPI
+
+# Publish when a (published) GitHub Release is created
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+
+      - name: Install dependencies
+        run: pip install build
+
+      - name: Build binary wheel and source tarball
+        run: python -m build
+
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@v3
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-pypi:
+    name: Publish to PyPI
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/Py-BOBYQA
+    permissions:
+      id-token: write
+    steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v3
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1