fix: add dependency-groups for dev tools, fix Windows CI shell compatibility

Author: mtingers

.github/workflows/ci.yml

@@ -18,7 +18,8 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-      - run: pip install -e ".[dev]" 2>/dev/null || pip install -e .
+      - run: pip install -e ".[dev]" || pip install -e .
+        shell: bash
       - run: pip install pytest
       - run: pytest tests/ -v
 

pyproject.toml

@@ -39,3 +39,6 @@ python_version = "3.9"
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
+
+[dependency-groups]
+dev = ["pytest>=7", "mypy>=1"]