Added samples for chart, gauge and calendar widgets

Author: dharanidharandharmasivam

images/calendar.png

@@ -1,9 +1,12 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_examples/model/model.dart';
 import 'package:flutter_examples/sample_browser.dart';
 import 'package:syncfusion_flutter_core/core.dart';
 
-void main() {
-  // Register your license here 
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized(); 
+  await updateControl();
+  // Register your license here
   SyncfusionLicense.registerLicense(null);
-  return runApp(SampleBrowser());
+  runApp(SampleBrowser());
 }