updated CHANGELOG.md

Author: pichillilorenzo

CHANGELOG.md

@@ -2,9 +2,9 @@
 
 - Added Android Hybrid Composition support "Use PlatformViewLink widget for Android WebView" [#462](https://github.com/pichillilorenzo/flutter_inappwebview/pull/462) (thanks to [plateaukao](https://github.com/plateaukao) and [tneotia](https://github.com/tneotia))
 - Merge "Upgraded appcompat to 1.2.0-rc-02" [#465](https://github.com/pichillilorenzo/flutter_inappwebview/pull/465) (thanks to [andreidiaconu](https://github.com/andreidiaconu))
+- Merge "Added missing field 'headers' which returned by WebResourceResponse.toMap()" [#490](https://github.com/pichillilorenzo/flutter_inappwebview/pull/490) (thanks to [Doflatango](https://github.com/Doflatango))
 - Fixed "window.flutter_inappwebview.callHandler is not a function" [#218](https://github.com/pichillilorenzo/flutter_inappwebview/issues/218)
 
-
 ## 4.0.0+4
 
 - Reverted calling `handler.post` on Android when a WebView is created