Upgrade peerDependency for redux to ^3.7.2

[mDibyo]

redux-loop/index.d.ts relies on the AnyAction type introduced in [email protected] (reduxjs/redux#2467 (comment)).

AFAIK, the redux-loop implementation itself doesn't depend on features introduced in 3.7.2.

If we want to keep the peerDependency at redux@^3.0.0, an alternate solution would be removing the AnyAction import and defining it ourselves. This doesn't seem like that big a deal: https://github.com/reactjs/redux/blob/master/index.d.ts#L25

[bdwain]

makes sense. 3.7.2 has been out a while. i don't see much benefit in using an earlier version of 3.

thanks!