Support TvOS TVML

[dseeker]

Just came across your project looking for a platform agnostic router (vue style) to use on a TVML application.
I saw in the source code references to window object, but TVML framework doesn't have a window object, of course this can be filled in webpack with a mock object, but I'm wondering if it would be possible to abstract window into a passable object so that we can also pass a custom object to parse the string from that could be used instead of window