title: Redux data not rerendering when setting value within object (Immutable.js)
body: <p>I have an immutable.js Map stored in Redux that is structured like:</p>
  <pre><code>reduxObject: {
      details: {}
      ...
      objectToChange: {
         myPosts: [{
          name: 'someName',
          link: 'someLink',
         }],
         drafts: []
      }
  }
  </code></pre>
  <p>I am trying to append the array objectToChange.myPosts in a reducer function using</p>
  <pre><code>let temp = state.getIn([objectToChange, myPosts])
  temp.push(action.payloadData)
  return state.setIn([objectToChange, myPosts], temp)
  </code></pre>
  <p>The redux data is getting updated, however the displayed redux data  isn't getting rerendered. I was expecting the state.setIn to create a new immutable object causing react native to trigger a rerender. Any suggestions or help would be greatly appreciated. Thanks ahead of time</p>