Remove react router apply middleware peer dependency

[perrin4869]

Now that react-router ships with applyRouterMiddleware by default, maybe the peer dependency to react-router-apply-middleware should be removed?

[perrin4869]

hm... I see that the code here is not built to work as a react-router middleware... I could send a PR to change that

[jaimemarijke]

I'm also running into a problem here - I'm using the applyRouterMiddleware function included with react-router by default to add the useScroll middleware. However, the useRelativeLinks middleware doesn't seem to work unless I use the applyRouterMiddleware function from react-router-apply-middleware. Any plans to consolidate the two?