fix CI error

Author: you-n-g

.github/workflows/test_macos.yml

@@ -60,7 +60,7 @@ jobs:
         python -m pip install --upgrade cython
         python -m pip install numpy jupyter jupyter_contrib_nbextensions
         python -m pip install -U scipy scikit-learn # installing without this line will cause errors on GitHub Actions, while instsalling locally won't
-        python setup.py install
+        pip install -e .
     - name: Install test dependencies
       run: |
         python -m pip install --upgrade pip