[webview_flutter_wkwebview] Updates generated pigeon code to ensure the internal wrapper immediately sends constructor calls (flutter#8657)

Potential solution to flutter/flutter#162437

As stated in flutter#8656 (comment), I can only reproduce the crash when adding a delay in the async anonymous function. This should ideally prevent that crash by ensuring the send call is made before entering an async method.

Author: bparrishMines

packages/webview_flutter/webview_flutter_wkwebview/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.18.2
+
+* Updates generated pigeon code to ensure the internal wrapper immediately sends constructor calls.
+
 ## 3.18.1
 
 * Fixes bug that would allow the API wrapper to return `null` when a non-null value was required in

packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift

@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v24.1.1), do not edit directly.
+// Autogenerated from Pigeon (v24.2.1), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 import Foundation