Fixed iOS 14.0 crash when calling callAsyncJavaScript method

CHANGELOG.md

@@ -35,6 +35,7 @@
 - Fixed Android `PullToRefreshController.setEnabled` at runtime
 - Fixed iOS `findNext`
 - Fixed Android `RendererPriorityPolicy.waivedWhenNotVisible` type 'Null' is not a subtype of type 'bool'
+- Fixed iOS 14.0 crash when calling `callAsyncJavaScript` method
 
 ## 5.4.4+3
 

ios/Classes/InAppWebView/WebViewChannelDelegate.swift

@@ -419,7 +419,7 @@ public class WebViewChannelDelegate : ChannelDelegate {
             break
         case .callAsyncJavaScript:
             if let webView = webView, #available(iOS 10.3, *) {
-                if #available(iOS 14.0, *) {
+                if #available(iOS 14.3, *) { // on iOS 14.0, for some reason, it crashes
                     let functionBody = arguments!["functionBody"] as! String
                     let functionArguments = arguments!["arguments"] as! [String:Any]
                     var contentWorld = WKContentWorld.page

lib/src/in_app_webview/in_app_webview_controller.dart

@@ -2798,7 +2798,7 @@ class InAppWebViewController {
   ///This parameter doesn’t apply to changes you make to the underlying web content, such as the document’s DOM structure.
   ///Those changes remain visible to all scripts, regardless of which content world you specify.
   ///For more information about content worlds, see [ContentWorld].
-  ///Available on iOS 14.0+.
+  ///Available on iOS 14.3+.
   ///
   ///**NOTE**: This method shouldn't be called in the [WebView.onWebViewCreated] or [WebView.onLoadStart] events,
   ///because, in these events, the [WebView] is not ready to handle it yet.