Add Flow type signatures about constate HOT 2 CLOSED

import React from "react";
import { createContainer } from "constate";

const initialState = { count: 0 };

const actions = {
  increment: () => state => ({ count: state.count + 1 })
};

const Container = createContainer({initialState, actions})

const Counter = () => (
  <Container>
    {({ count, increment }) => (
      <button onClick={increment}>{count}</button>
    )}
  </Container>
);