(feat) update react navigator v4

src/navigation/NavigationStack.js

-import { createStackNavigator, createAppContainer } from 'react-navigation';
-
+import { createAppContainer } from 'react-navigation';
+import { createStackNavigator } from 'react-navigation-stack';
 import LoadingScreen from '../LoadingScreen';
 import LoginScreen from '../auth/LoginScreen';
 import ForgotScreen from '../auth/ForgotScreen';

src/tabs/TabsScreen.js

 import React, {
     Component
 } from 'react';
+
+import { createMaterialTopTabNavigator } from 'react-navigation-tabs';
 import {
-  createMaterialTopTabNavigator,
   jumpTo,
   SafeAreaView
 } from 'react-navigation';