add build step

Author: andrewfulton9

.github/workflows/python.yml

@@ -20,7 +20,9 @@ jobs:
     - name: Test with pytest
       run: |
         nox -s smoke
-        
+    - name: build package
+      run: |
+        nox -s build
     - name: Publish package
       if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@master

noxfile.py

@@ -16,3 +16,8 @@ def install(session):
 def smoke(session):
     session.install(*"pytest".split())
     session.run(*"pytest --skiphdfs upath".split())
+
+
+@nox.session(python=False)
+def build(session):
+    session.run(*"flit build".split())