Added Asturian language

ios/Runner/Info.plist

@@ -43,6 +43,7 @@
 	<false/>
 	<key>CFBundleLocalizations</key>
     <array>
+    	<string>ast</string>
     	<string>en</string>
     	<string>es</string>
     	<string>fr</string>

lib/main.dart

@@ -91,6 +91,7 @@ void main() async {
         EasyLocalization(
           path: 'assets/translations',
           supportedLocales: const <Locale>[
+            Locale('ast'),
             Locale('ca'),
             Locale('de'),
             Locale('en'),

lib/ui/screens/fifth_screen.dart

@@ -63,6 +63,10 @@ class FifthScreen extends StatelessWidget {
                         NotificationController.locale = newLocale;
                       },
                       items: const <DropdownMenuItem<Locale>>[
+                        DropdownMenuItem<Locale>(
+                          value: Locale('ast'),
+                          child: Text('Asturianu'),
+                        ),
                         DropdownMenuItem<Locale>(
                           value: Locale('ca'),
                           child: Text('Català'),