Fix PyPI version check to handle null responses in workflow (very fir…

…st PyPI release)

.github/workflows/publish-pypi.yml

@@ -47,9 +47,8 @@ jobs:
         id: check_pypi
         run: |
           response=$(curl -s https://pypi.org/pypi/${{ env.PACKAGE_NAME }}/json || echo "{}")
-          latest_previous_version=$(echo $response | jq -r '.releases | keys_unsorted | sort | .[-1]')
-          if [ -z "$latest_previous_version" ]; then
-            echo "Package not found on PyPI."
+          latest_previous_version=$(echo "$response" | jq -r '.releases | keys_unsorted | sort | .[-1]' || echo "0.0.0")
+          if [ -z "$latest_previous_version" ] || [ "$latest_previous_version" == "null" ]; then
             latest_previous_version="0.0.0"
           fi
           echo "latest_previous_version=$latest_previous_version" >> $GITHUB_ENV