refactor: define types, router 4 support

[reslear]

No description provided.

[grafikri]

I think this approach is not true. Because this line restricts the developer from being sent custom data to the middleware.

[reslear]

of course, need like declare module 'name'
for example vue router meta

declare module 'vue-router' {
  interface RouteMeta {
    // is optional
    isAdmin?: boolean
    // must be declared by every route
    requiresAuth: boolean
  }
}

but i don't understand how it works, need investigate, maybe you help?

[grafikri]

By the way, Maybe I will mark this repository as deprecated(after released a new version and more good interface) because I found a bug for chained middlewares.