avoid deprecated call to setup.py

Author: graingert

.github/workflows/ci.yaml

@@ -161,9 +161,8 @@ jobs:
 
     - name: Build
       run: |
-        python -m pip install --upgrade pip wheel pep517
         rm -rf dist/*
-        python setup.py bdist_wheel sdist
+        pipx run build .
 
     - name: Files to be pushed to PyPi
       run: ls -R dist/