ci: upload to PyPI from the runner instead of docker compose

The minio/minio image is no longer available on Docker Hub, so the
docker compose based upload failed for v0.14.10 before anything was
uploaded. Upload with twine directly on the runner, as master does,
and open the version.py PR against maint/0.14 instead of master.

Author: dimitri-yatsenko

.github/workflows/post_draft_release_published.yaml

@@ -81,28 +81,19 @@ jobs:
         env:
           RELEASE_NAME: ${{ github.event.release.name }}
         run: |
-          export HOST_UID=$(id -u)
+          python -m pip install --upgrade twine
           if [[ "$RELEASE_NAME" =~ ^Test ]]; then
-            LATEST_PYPI=$(curl -s https://test.pypi.org/pypi/datajoint/json | jq -r '.info.version')
             echo "TEST_PYPI=true" >> $GITHUB_ENV
             export TWINE_REPOSITORY="testpypi"
             export TWINE_USERNAME=${TWINE_TEST_USERNAME}
             export TWINE_PASSWORD=${TWINE_TEST_PASSWORD}
           else
-            LATEST_PYPI=$(curl -s https://pypi.org/pypi/datajoint/json | jq -r '.info.version')
             echo "TEST_PYPI=false" >> $GITHUB_ENV
             export TWINE_REPOSITORY="pypi"
           fi
-          # Check if the new version is different from the latest on PyPI, avoid re-uploading error
-          if [ "$NEW_VERSION" != "$LATEST_PYPI" ]; then
-            docker compose run --build --quiet-pull \
-            -e TWINE_USERNAME=${TWINE_USERNAME} \
-            -e TWINE_PASSWORD=${TWINE_PASSWORD} \
-            -e TWINE_REPOSITORY=${TWINE_REPOSITORY} \
-            app sh -c "pip install twine && python -m twine upload dist/*"
-          else
-            echo "::warning::Latest version $LATEST_PYPI on $TWINE_REPOSITORY is the new version $NEW_VERSION"
-          fi
+          # Upload the artifacts built in the previous step. --skip-existing
+          # keeps re-runs idempotent (no error if the version already exists).
+          python -m twine upload --skip-existing dist/*
       # Upload package as release assets
       - name: Upload pip wheel asset to release
         uses: actions/upload-release-asset@v1
@@ -130,7 +121,7 @@ jobs:
           gh pr create \
             --title "[github-actions]Update version.py to ${{ github.event.release.name }}" \
             --body "This PR updates \`version.py\` to match the latest release: ${{ github.event.release.name }}" \
-            --base master \
+            --base maint/0.14 \
             --head ${{ env.BRANCH_NAME }} \
             --reviewer dimitri-yatsenko,drewyangdev,ttngu207
       - name: Post release notification to Slack