Fixed build error

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
                   python -m pip install --upgrade pip
                   pip install --user --no-cache-dir Cython
                   pip install --user -r requirements.txt
-                  pip install --user -r requirements_dev.txt
+                  pip install .
             - name: PKG-TEST
               run: |
                   python -m unittest discover tests/