handle hook should accept { request, render } rather than positional parameters

[Conduitry]

Is your feature request related to a problem? Please describe.
Public APIs should be future proofed, and should avoid positional parameters

Describe the solution you'd like
The handle hook should accept a single argument with { request, render } as an object, rather than as two separate arguments.

Describe alternatives you've considered
Not really.

How important is this feature to you?
We should get this in before 1.0, because it is breaking.

Additional context
I ran this by Rich on Discord first, and he approves.

[Conduitry]

@Rich-Harris #959 hasn't been merged, why was this closed?

[Rich-Harris]

d'oh, i thought it had been merged. i was tired