combine .github/workflows/{test,publish}.yml into 1 workflow

now triggering pypi publish on GH release instead of version tag push

Author: janosh

.github/workflows/publish.yml

@@ -5,16 +5,18 @@ on:
     branches: [main]
   pull_request:
     branches: [main]
+  release:
+    types: [published]
 
 jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8
           cache: pip
@@ -24,4 +26,15 @@ jobs:
         run: pip install .[test]
 
       - name: Run tests
+        id: tests
         run: pytest --cov format_ipy_cells
+
+      - name: Build and upload dist
+        if: github.event_name == 'release' && steps.tests.outcome == 'success'
+        run: |
+          pip install setuptools wheel twine
+          python setup.py sdist bdist_wheel
+          twine upload --skip-existing dist/*.tar.gz
+        env:
+          TWINE_USERNAME: janosh
+          TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}