[REF-2788] Stuck on fastapi < 0.111.0

[masenf]

FastAPI 0.111.0 depends on the new fastapi-cli package, which depends on uvicorn 0.29.0 as an optional package... however poetry will not resolve the conflict because reflex currently pins to uvicorn 0.20 and 0.24 (py3.12) to avoid breakage on windows introduced in later versions.

Until new versions of uvicorn can properly support hot-reload and exiting on windows with py3.12, then reflex is stuck on the older version of fastapi.

_REF-2788

[masenf]

Fixed upstream via tiangolo/fastapi-cli#16