Update release triggers

Author: sprenger

.github/workflows/release.yml

@@ -1,10 +1,9 @@
 name: Create PYPI Release
 on:
   push:
-    branches:
-      - main
-    paths:
-      - VERSION
+    # Pattern matched against refs/tags
+    tags:
+      - '*'           # Push events to every tag not containing /
 
 jobs:
   build-n-publish:
@@ -36,7 +35,8 @@ jobs:
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
     - name: Publish distribution to PyPI
-      if: startsWith(github.ref, 'refs/tags')
+      # 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 }}