fix: support 3.9+

Author: phi-friday

.github/workflows/lint.yaml

@@ -31,7 +31,7 @@ jobs:
         uses: actions/setup-python@v4
         id: install-python
         with:
-          python-version: 3.12
+          python-version: 3.9
 
       - name: Install uv
         uses: yezz123/setup-uv@v4