status === 'loading' when queryKey is falsey

[benmonro]

when using a 'lazy' query (i.e. passing in a falsey value for the queryKey), the status is indefinitely set to "loading." even though the status will never change from that, this can cause bugs in the UI where folks will be rendering a spinner. Seems to make more sense to have status default to 'success' if the queryKey is falsey and only be 'loading' when the key is truthy.

i.e.

const {status} = useQuery(false && myKey, fetcher)

status === "success"

const {status} = useQuery(true && myKey, fetcher)

status === "loading"