Use destructuring to import Component

You use destructuring in your course so it makes sense to have the redux simple starter boilerplate use the same syntax

src/components/app.js

@@ -1,5 +1,4 @@
-import React from 'react';
-import { Component } from 'react';
+import React, { Component } from 'react';
 
 export default class App extends Component {
   render() {