Attempt to fix source dist build in github action

Author: fhs

.github/workflows/package.yml

@@ -80,7 +80,7 @@ jobs:
 
           - name: Create source distribution archive
             run: |
-              python -m pip install numpy
+              python -m pip install build
               python -m build --sdist -o wheelhouse
 
           - uses: actions/upload-artifact@v2