title: Error with Redux DevTools Extension using TS: "Property '__REDUX_DEVTOOLS_EXTENSION_COMPOSE__' does not exist on type 'Window'."?
body: <p>I'm getting this error on my index.tsx. </p>
  
  <p>Property '<strong>REDUX_DEVTOOLS_EXTENSION_COMPOSE</strong>' does not exist on type 'Window'.</p>
  
  <p>Here is my index.tsx code: </p>
  
  <pre><code>import * as React from 'react';
  import * as ReactDOM from 'react-dom';
  import App from './App';
  import './index.css';
  import registerServiceWorker from './registerServiceWorker';
  
  import { Provider } from 'react-redux';
  
  import { createStore, compose, applyMiddleware } from 'redux';
  import rootReducer from './store/reducers';
  
  import thunk from 'redux-thunk';
  
  const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
  
   const store = createStore(rootReducer, composeEnhancers(
       applyMiddleware(thunk)
   ));
  
  ReactDOM.render(  &lt;Provider store={store}&gt;&lt;App /&gt;&lt;/Provider&gt;, document.getElementById('root'));
  
  registerServiceWorker();
  </code></pre>
  
  <p>I've installed @types/npm install --save-dev redux-devtools-extension and I'm using create-react-app-typescript. Thanks alot for any tips for what's going on in advance.</p>