Middleware config does not work with grouped export statement

### Link to the code that reproduces this issue https://github.com/jplwood/next13-middleware-export-issue/blob/main/src/middleware.ts ### To Reproduce As a matter of preference , we enforce having a single export for any given file's named exports (my org has lint rules around this, see [import/group-exports](https://github.com/import-js/eslint-plugin-import/blob/main/docs/rules/group-exports.md#importgroup-exports)). i.e., ```ts // this const a = 1; const b = 2; export { a, b } // not this export const a = 1; export const b = 2; ``` In Next.js Middlewares, if you attempt to do this, the Middleware config is not applied. For example, this works: ```ts export const middleware = async (req: NextRequest) => { console.log(`MIDDLEWARE: `, req.url); return NextResponse.next(); }; export const config = { //prettier-ignore matcher: ["/((?!_next/static|_next/image|.*\.ico|.*\.svg).*)"], }; ``` with Console output: ``` MIDDLEWARE: http://localhost:3000/ ``` Whereas this does not work, config is not applied: ```ts const middleware = async (req: NextRequest) => { console.log(`MIDDLEWARE: `, req.url); return NextResponse.next(); }; const config = { matcher: ["/((?!_next/static|_next/image|.*.ico|.*.svg).*)"], }; export { middleware, config }; ``` with Console output: ``` MIDDLEWARE: http://localhost:3000/ MIDDLEWARE: http://localhost:3000/_next/static/media/c9a5bc6a7c948fb0-s.p.woff2 MIDDLEWARE: http://localhost:3000/_next/static/css/app/layout.css?v=1696457999436 MIDDLEWARE: http://localhost:3000/_next/static/css/app/page.css?v=1696457999436 MIDDLEWARE: http://localhost:3000/vercel.svg MIDDLEWARE: http://localhost:3000/next.svg MIDDLEWARE: http://localhost:3000/_next/static/chunks/webpack.js?v=1696457999436 MIDDLEWARE: http://localhost:3000/_next/static/chunks/main-app.js?v=1696457999436 MIDDLEWARE: http://localhost:3000/_next/static/chunks/app-pages-internals.js MIDDLEWARE: http://localhost:3000/_next/static/chunks/app/page.js MIDDLEWARE: http://loca…