Fix installation

Author: yuzie007

.github/workflows/tests.yml

@@ -22,10 +22,8 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install pandas
-          python -m pip install ase
-          python -m pip install spglib
           python -m pip install pytest
+          python -m pip install .
       - name: Run pytest
         run: |
           python -m pytest