Bump isparta to v4 to fix test coverage
Bump isparta to v4 to fix test coverage

gaearon/react-redux,rackt/react-redux,gnoff/react-redux,roth1002/react-redux,l2silver/react-redux-blackbox,bbenezech/react-redux,tgriesser/react-redux,jimbolla/react-redux,reactjs/react-redux