Custom updaters as props for use in abstracted methods

[jamesrweb]

In the use case described by @hanhanxue in #371, we should be able to allow abstracted methods to reach and update state in a cleaner manner than is currently possible. We are limited by React itself at the moment as it does not allow us to use set state down tree within the useEffect handler we have for updateWithProps. Maybe there is another way? 💭