Merge pull request #582 from facelessuser/bugfix/setuptools

Fix sdist license failure with setuptools

Author: mrabarnett

.github/workflows/main.yml

@@ -47,6 +47,7 @@ jobs:
 
       - name: Build source distribution
         run: |
+          python -m pip install -U setuptools
           python setup.py sdist --formats=gztar
 
       - name: Upload source distribution