update vue router type extension to supported approach

[spencercap]

router.ts

// TODO update this awkward type extension to new well supported appraoch
// https://vuejs.org/api/utility-types.html#componentcustomoptions
/**
import { Route } from 'vue-router'

declare module 'vue' {
interface ComponentCustomOptions {
	beforeRouteEnter?(to: any, from: any, next: () => void): void
    }
}

*/