[webview_flutter] Update webview_flutter documentation (flutter#4481)

Author: NickalasB

packages/webview_flutter/webview_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.3.1
+
+* Add iOS-specific note to set `JavascriptMode.unrestricted` in order to set `zoomEnabled: false`.
+
 ## 2.3.0
 
 * Add ability to enable/disable zoom functionality.

packages/webview_flutter/webview_flutter/lib/src/webview.dart

@@ -272,6 +272,9 @@ class WebView extends StatefulWidget {
   /// A Boolean value indicating whether the WebView should support zooming
   /// using its on-screen zoom controls and gestures.
   ///
+  /// *Note: On iOS [javascriptMode] must be set to
+  /// [JavascriptMode.unrestricted] in order to set [zoomEnabled] to false
+  ///
   /// By default 'zoomEnabled' is true
   final bool zoomEnabled;
 

packages/webview_flutter/webview_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter
 description: A Flutter plugin that provides a WebView widget on Android and iOS.
 repository: https://github.com/flutter/plugins/tree/master/packages/webview_flutter/webview_flutter
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 2.3.0
+version: 2.3.1
 
 environment:
   sdk: ">=2.14.0 <3.0.0"