ci: publish: use trusted publishing

.github/workflows/publish.yml

@@ -1,6 +1,5 @@
-# This workflows will upload a Python Package using Twine when a release is created
-# For more information see: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries
-
+# use PyPI trusted publishing, as described here: 
+# https://blog.trailofbits.com/2023/05/23/trusted-publishing-a-new-benchmark-for-packaging-security/
 name: publish to pypi
 
 on:
@@ -8,8 +7,12 @@ on:
     types: [published]
 
 jobs:
-  deploy:
-    runs-on: ubuntu-20.04
+  pypi-publish:
+    runs-on: ubuntu-latest
+    environment:
+      name: release
+    permissions:
+      id-token: write
     steps:
       - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
       - name: Set up Python
@@ -19,11 +22,9 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install setuptools wheel twine
-      - name: Build and publish
-        env:
-          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
-          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+          pip install setuptools wheel
+      - name: build package
         run: |
           python setup.py sdist bdist_wheel
-          twine upload --skip-existing dist/*
+      - name: publish package
+        uses: pypa/gh-action-pypi-publish@release/v1