Update build-test-gc.yml

Author: loli

.github/workflows/build-test-gc.yml

@@ -38,5 +38,10 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install -v .[test]
+    - name: Check install
+      run: |
+        python -c "import medpy; print(medpy.__file__)"
+        python -c "import medpy.graphcut; print(medpy.graphcut.__file__)"
+        python -c "import medpy.graphcut; print(medpy.graphcut.maxflow.__file__)"
     - name: Test with pytest
       run: pytest tests/graphcut_/*