Redirect to URL object instead of relative URL

[guidovizoso]

This fixes #48 and #71.

Why this is required: https://nextjs.org/docs/messages/middleware-relative-urls

Of course everything is up for discussion! Hope this helps and thanks for this starter.

[vercel]

@guidovizoso is attempting to deploy a commit to the Platformize Team on Vercel.

A member of the Team first needs to authorize it.

[gregonarash]

This seems to be obvious solution based on changes made to 12.1.

Thanks for pointing this out.

[steven-tey]

Thank you for pointing this out! We're fixing this in the Typescript PR (#15) but will merge this to main anyways! :)