title: Error: `createNavigationContainer()` has been removed. Use `createAppContainer()` instead
body: <p>As you can see in my simple code, i am not using createNavigationContainer/createAppContainer but i am getting that error. I do not know why this is happening. I am stuck !</p>
  
  <pre><code>import React, { Component } from 'react';
  import {Router, Stack, Scene} from 'react-native-router-flux';
  
  import LogIn from './pages/LogIn';
  import SignUp from './pages/SignUp';
  import { View } from 'react-native';
  
  
  export default class Routes extends React.Component {
  
      render(){
          return(
              &lt;Router&gt;
                  &lt;Stack key="root" hideNavBar={true}&gt;
                      &lt;Scene key="LogIn" component={LogIn} title="Login" initial={true}/&gt;
                      &lt;Scene key="SignUp" component={SignUp} title="SignUp"/&gt;
                  &lt;/Stack&gt;
  
              &lt;/Router&gt;
  
          );
      }
  }
  
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/4xOiL.png" alt="enter image description here">></p>
  
  <pre><code>  "dependencies": {
      "expo": "^35.0.0",
      "react": "16.8.3",
      "react-dom": "16.8.3",
      "react-native": "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz",
      "react-native-gesture-handler": "~1.3.0",
      "react-native-reanimated": "~1.2.0",
      "react-native-router-flux": "^4.0.6",
      "react-native-screens": "~1.0.0-alpha.23",
      "react-native-web": "^0.11.7",
      "react-navigation": "^4.0.10",
      "react-redux": "^7.1.3",
      "react-scripts": "^3.2.0",
      "redux": "^4.0.4",
      "redux-thunk": "^2.3.0",
  </code></pre>