fix: add Starlette 1.0 compatibility (#13159)
* fix: add Starlette 1.0 compatibility
Relax the starlette version constraint from <1.0 to <2.0 to allow
installation alongside Starlette 1.0.0+.
Starlette 1.0 removed some deprecated APIs (on_startup/on_shutdown
parameters, decorator-style routing on Starlette/Router) but gradio
uses these through FastAPI which still supports them. The starlette
imports gradio uses directly (GZipResponder, guess_type, MultiPartException,
MultipartPart, etc.) remain available in Starlette 1.0.
Closes #13130
* Update Starlette compatibility to minor version
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Co-authored-by: Freddy Boulton <41651716+freddyaboulton@users.noreply.github.com>
