Allow non-unique route names

[frenzzy]

Option uniqueRouteNameSep allows using non-unique route names among different branches of nested routes.
The router will automatically generate unique names based on parent routes using the specified separator:

const router = new UniversalRouter([
  { name: 'users', path: '/users', children: [{ name: 'list', path: '/list' }] },
  { name: 'pages', path: '/pages', children: [{ name: 'list', path: '/list' }] },
])
const url = generateUrls(router, { uniqueRouteNameSep: '.' })
url('users.list')                     // => /users/list
url('pages.list')                     // => /pages/list

Closes #193

[joezappie]

Just got a chance to play with this and from what I can tell it works great. I'll definitely be testing it more in depth in the coming week but from my initial tests I've found no issues.

Only thing I found was in the code you use "uniqueRouteNameSep" and in your example above you used "uniqueNameSep". Either of these sound good to me.

Is the preferred method of donation through your open collective link? Really appreciate you adding this in for me and in such little time too!

[codecov-commenter]

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[frenzzy]

@jrj2211 thanks for the review, fixed. Sponsor link should work and yes, open collective is the only way of receiving donations we have at the moment.

Released under v9.1.0 🎉