explicitly uninstall pydra and fileformats-medimage

Author: tclose

.github/workflows/ci-cd.yml

@@ -39,6 +39,7 @@ jobs:
         pip install ".[test]"
     - name: Install development Pydra and fileformats-medimage
       run: |
+        pip uninstall pydra fileformats-medimage -y
         pip install --no-deps git+https://github.com/nipype/pydra.git@new-syntax
         pip install --no-deps git+https://github.com/arcanaframework/fileformats-medimage.git@pydra-syntax-changes
     - name: Test with pytest