build: temporarily pin starlette max version (#94)

Starlette introduced a new parameter to `CORSMiddleware` in
[v0.51.0](https://github.com/Kludex/starlette/releases/tag/0.51.0),
which broke positional arguments order in `stac-fastapi` implementation.

Temporarily pin starlette max version to `< 0.51.0` until
stac-utils/stac-fastapi#882 is merged.

Author: sbrunato

pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "stac-fastapi.types",
     "stac-pydantic==3.1.*",
     "brotli-asgi",
-    "starlette",
+    "starlette < 0.51.0",
     "typing_extensions",
     "shapely",
 ]