title: Widgets direction does not change to RTL when change localization to Arabic in Flutter
body: <p>I have an app and I want to localize it to Arabic using <a href="https://pub.dev/packages/easy_localization#-readme-tab-" rel="noreferrer">easy_localization</a> package. It changes the language but the direction of the widgets does not change.</p>
  
  <pre><code>void main() {
    runApp(
      EasyLocalization(
        child: MyApp(),
        supportedLocales: [
          Locale('en', 'US'),
          Locale('ku', ''),
          Locale('ar','DZ'),
        ],
        path: 'assets/langs',
  
      ),
    );
  }
  </code></pre>
  
  <pre><code>  @override
    Widget build(BuildContext context) {
      return MaterialApp(
        localizationsDelegates: [
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
          GlobalCupertinoLocalizations.delegate,
          KuMaterialLocalizations.delegate
        ],
        locale: Locale('ar'),
        title: 'MyApp',
        theme: ThemeData(
          primarySwatch: Colors.blue,
          visualDensity: VisualDensity.adaptivePlatformDensity,
        ),
        home: Language(),
      );
    }
  }
  </code></pre>