Client-side store memoization probably not working with Hot Module Replacement (HMR)

[timotgl]

I suspect that the same issue I created on next-redux-wrapper: kirill-konshin/next-redux-wrapper#25 also exists here because the cache is in module scope: https://github.com/huzidaha/next-connect-redux/blob/master/lib/index.js#L42

Next.js uses HMR by default, and I think it's likely that users of redux+next.js will at some point create a container with connect and run into this issue.