Fix example in readme (flutter#3169)

Author: Emmanuel Garcia

packages/webview_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.5
+
+* Fix example in the readme.
+
 ## 1.0.4
 
 * Suppress the `deprecated_member_use` warning in the example app for `ScaffoldMessenger.showSnackBar`.

packages/webview_flutter/README.md

@@ -37,9 +37,15 @@ import 'dart:io';
 import 'package:webview_flutter/webview_flutter.dart';
 
 class WebViewExample extends StatefulWidget {
+  @override
+  WebViewExampleState createState() => WebViewExampleState();
+}
+
+class WebViewExampleState extends State<WebViewExample> {
   @override
   void initState() {
     super.initState();
+    // Enable hybrid composition.
     if (Platform.isAndroid) WebView.platform = SurfaceAndroidWebView();
   }
 

packages/webview_flutter/pubspec.yaml

@@ -1,6 +1,6 @@
 name: webview_flutter
 description: A Flutter plugin that provides a WebView widget on Android and iOS.
-version: 1.0.4
+version: 1.0.5
 homepage: https://github.com/flutter/plugins/tree/master/packages/webview_flutter
 
 environment: