Respond with a redirect to location.
The URI in location should be absolute, but there are no checks
to enforce that.
By default the HTTP status code HttpStatus.MOVED_TEMPORARILY
(302) is used for the redirect, but an alternative one can be
specified using the status argument.
This method will also call close, and the returned future is
the furure returned by close.
Source
Future redirect(Uri location, {int status: HttpStatus.MOVED_TEMPORARILY});