- Upgrade Starlette to 0.16.0, bringing bug fixes and minor breaking changes.
- Update optional dependency version ranges for Jinja2 (2.11.2,<4.0.0) and ItsDangerous (1.1.0,<3.0.0).
- Facilitate gradual migration via intermediate FastAPI releases (0.68.2 → 0.69.0 → 0.70.0) to isolate potential breaking impacts.