Function multiArgMiddleware

test/applyMiddleware.spec.ts:138–145

      any,
      MultiDispatch
    > = _store => {
      return next => (action: any, callArgs?: any) => {
        if (Array.isArray(callArgs)) {
          return action(...callArgs)
        }
        return next(action)
      }
    }

    function dummyMiddleware({ dispatch }: MiddlewareAPI) {
      return (_next: unknown) => (action: any) => dispatch(action, testCallArgs)