fix(middleware): handle no argument case

[balazsorban44]

export { default } from "next-auth/middleware

and

import withAuth from "next-auth/middleware"
export default withAuth()

cases were broken.

Also changed to using absolute URLs when redirecting.

Reasoning 💡

Checklist 🧢

• Documentation
• Tests
• Ready to be merged

Affected issues 🎟

[codecov-commenter]

Codecov Report

Merging #3799 (cabc08c) into main (f3be5e8) will not change coverage.
The diff coverage is 0.00%.

❗ Current head cabc08c differs from pull request most recent head b451943. Consider uploading reports for the commit b451943 to get more accurate results

@@           Coverage Diff           @@
##             main    #3799   +/-   ##
=======================================
  Coverage   12.70%   12.70%           
=======================================
  Files          94       94           
  Lines        1496     1496           
  Branches      400      400           
=======================================
  Hits          190      190           
  Misses       1295     1295           
  Partials       11       11           

Impacted Files	Coverage Δ
src/next/middleware.ts	0.00% <0.00%> (ø)

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[github-actions]

🎉 Experimental release published on npm!

npm i next-auth@0.0.0-pr.3799.b9241d4a

yarn add next-auth@0.0.0-pr.3799.b9241d4a