Using different module for type checking and runtime

[leifwar]

What is the reason for forcing httpx when type checking in starlett/testclient.py even if httpx2 is available and used in runtime?

if TYPE_CHECKING:
    import httpx
else:
    try:
        import httpx2 as httpx
    except ModuleNotFoundError:  # pragma: no cover
    .....

This causes pyright to fail when checking code using the testclient where httpx2 is available.

[Kludex]

I guess it was a choice, but you have a point, since I deprecated. It slipped my mind.

Would you like to open a PR to fix it?

[leifwar]

I see now that it is not straight forward to fix this.