Use build command instead of setup.py

Manifester's python-publish workflow has been failing during the Setup
and Build step. These failures persisted after my previous PR fixing a
syntax issue with the version. This PR switches from invoking `setup.py`
directly to invoking the `build` tool in an attempt to resolve the
error.

.github/workflows/python-publish.yml

@@ -25,7 +25,7 @@ jobs:
       run: |
         pip install -U pip
         pip install .[setup]
-        python setup.py sdist bdist_wheel
+        python -m build
         python -m twine check dist/*
 
     - name: Build and publish