replace python setup.py install with pip install . (#3396)

Author: BanzaiTokyo

.github/workflows/unit-tests.yml

@@ -93,7 +93,7 @@ jobs:
       - name: Install dependencies
         run: |
           pip install -r requirements-dev.txt
-          python setup.py install
+          pip install .
           pip list
 
       - name: Check code formatting