removed splashscreen dependency (deprecated)

SwimTracker/App.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import AppLoading from 'expo-app-loading';
+import * as SplashScreen from 'expo-splash-screen';
 import { Ionicons } from '@expo/vector-icons';
 import * as Font from 'expo-font';
 
@@ -37,6 +37,9 @@ const store = createStore(persistedReducer);
 const persistor = persistStore(store);
 const Stack = createStackNavigator();
 
+// Keep the splash screen visible while we fetch resources
+SplashScreen.preventAutoHideAsync();
+
 export default class App extends React.Component {
     constructor(props) {
         super(props);
@@ -70,9 +73,10 @@ export default class App extends React.Component {
     }
 
     render() {
-        if (!this.state.isReady) {
-            return <AppLoading />;
+        if(this.state.isReady) {
+           SplashScreen.hideAsync();
         }
+        
         const screenOptions = {
             headerShown: false,
         };
@@ -137,7 +141,7 @@ export default class App extends React.Component {
 
         return (
             <Provider store={store}>
-                <PersistGate loading={<AppLoading />} persistor={persistor}>
+                <PersistGate persistor={persistor}>
                     <NavigationContainer >
                         <Stack.Navigator >
                             {activeView}