Fix render type of RouteProps.

[juri-t]

Nice to meet you.

If I used Hyperapp v1 in TypeScript, I corrected it because Route can not interpret types well.

render seems to assume a function that returns VNode, but I think it would be better to receive Component more widely, but would you suggest it?

Now

export const Hoge = (): VNode<RenderProps<{}>> => {
  return ( ... )
}

 <Route path="/something" render={Hoge}/>

But I want to use

export const Hoge: Component<RenderProps<{}>> = () => {
  return ( ... )
}

Thank you

Hyperapp 1.2.5
TypeScript 3.1.4