mapResponse types are not aligned with runtime behavior

[mattersj]

What version of Elysia is running?

1.2.9

What platform is your computer?

Darwin 23.5.0 arm64 arm

What steps can reproduce the bug?

Since 1.2.7 response type in mapResponse was changed to unknown and now is not aligned with the way runtime works.

new Elysia().mapResponse(({ response }) => response); works perfectly in runtime but gives an error on a type level (see test/lifecycle/map-response.test.ts:266). Apparently, it now forces you to handle unknown type and convert it manually to Response which is not really convenient and requires you to do stuff like JSON.stringify on your own.

I think the runtime behavior makes more sense and it should be allowed to return any type (taking into account the response schema if provided) as you already can do in the handler itself (you can still choose to return Response explicitly if you want to though).

What is the expected behavior?

mapResponse return type should be aligned with runtime behavior.

What do you see instead?

Additional information

No response

Have you try removing the node_modules and bun.lockb and try again yet?

No response