Added Dutch locale

mobile/ios/Runner/Info.plist

@@ -92,7 +92,9 @@
       <string>it</string>
       <string>fi</string>
       <string>ja</string>
+      <string>nl</string>
       <string>pl</string>
+      <string>pt</string>
     </array>
   </dict>
 </plist>

mobile/lib/constants/locales.dart

@@ -11,6 +11,7 @@ const List<Locale> locales = [
   Locale('fr', 'FR'),
   Locale('it', 'IT'),
   Locale('ja', 'JP'),
+  Locale('nl', 'NL'),
   Locale('pl', 'PL'),
   Locale('pt', 'PR')
 ];