pypi upload workflow maintenance (pydata#5269)

* also upload on tags

* don't run on commits on master [skip-ci]

* don't check for tags (releases are always on tags) [skip-ci]

.github/workflows/pypi-release.yaml

@@ -4,8 +4,8 @@ on:
     types:
       - published
   push:
-    branches:
-      - master
+    tags:
+      - 'v*'
 
 jobs:
   build-artifacts:
@@ -63,7 +63,7 @@ jobs:
           ls -ltrh
           ls -ltrh dist
       - name: Publish package to TestPyPI
-        if: github.event_name == 'push' || startsWith(github.event.ref, 'refs/tags/v')
+        if: github.event_name == 'push'
         uses: pypa/gh-action-pypi-publish@v1.4.2
         with:
           user: __token__
@@ -72,7 +72,7 @@ jobs:
           verbose: true
 
       - name: Check uploaded package
-        if: github.event_name == 'push' || startsWith(github.event.ref, 'refs/tags/v')
+        if: github.event_name == 'push'
         run: |
           sleep 3
           python -m pip install --upgrade pip