Trigger PyPI packaging via github releases

Author: sprenger

.github/workflows/release.yml

@@ -1,9 +1,7 @@
 name: Create PYPI Release
 on:
-  push:
-    # Pattern matched against refs/tags
-    tags:
-      - '*'           # Push events to every tag not containing /
+  release:
+    types: [published]
 
 jobs:
   build-n-publish:
@@ -35,8 +33,6 @@ jobs:
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
     - name: Publish distribution to PyPI
-      # only consider version tags starting with 'v' and not alpha or beta releases
-      if: startsWith(github.ref, 'refs/tags/v') & ~{contains(github.ref, '-a') || contains(github.ref, '-b')}
       uses: pypa/gh-action-pypi-publish@master
       with:
         password: ${{ secrets.PYPI_API_TOKEN }}