Use uv for package installation

.github/workflows/pytest.yml

@@ -26,11 +26,11 @@ jobs:
           ${{ runner.os }}-pip-${{ runner.os }}-
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        if [ -f optional_requirements.txt ]; then pip install -r optional_requirements.txt; fi
-        pip install -e .
+        python -m pip install uv
+        uv pip install flake8 pytest
+        if [ -f requirements.txt ]; then uv pip install -r requirements.txt; fi
+        if [ -f optional_requirements.txt ]; then uv pip install -r optional_requirements.txt; fi
+        uv pip install -e .
     - name: Test with pytest
       run: |
         pytest