Allow context for useStore hook to be overridden

[mpeyper]

Do you want to request a feature or report a bug?

Feature.

What is the current behavior?

You cannot override the context to use for the useStore hook in the same way you can for Provider and connect, at least as far as I can tell.

What is the expected behavior?

I would like this feature as I need to override set the context to work around an issue with using lerna monorepo (the synlinked packages get their own copy of react-redux and consequently a different context instance).

I propose to add a context argument to useStore and pass it through to useReduxContext and use it if provided or fallback to the existing imported ReactReduxcContext.

I'm happy to make the change and I may even create a PR anyway.

[mpeyper]

I just saw #1309, so I'll close this and watch that one.