Test implementation on both client-side and server-side.

Allow handler to check for original method.

Allow ways to send methods other than get/post on server-side.

Process redirects and parse resource locations for both server-side and client-side.

Reorganize exports.

Group related code in backend.

De/serialize response using seroval for cookies.

Add clarification.

Show usage guide.

Add files from pridepack and create-next-app.