[flutter_template_images] Add iOS app icon assets (flutter#2266)

Author: RockerFlower

packages/flutter_template_images/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 4.2.0
+
+* Adds iOS template app icons, updated to square icons with no transparency.
+
 ## 4.1.1
 
 * Removes empty Dart file.

packages/flutter_template_images/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_template_images
 description: Image files for use in flutter_tools templates without adding binary files to flutter/flutter.
 repository: https://github.com/flutter/packages/tree/main/packages/flutter_template_images
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_template_images%22
-version: 4.1.1
+version: 4.2.0
 
 environment:
   sdk: ">=2.12.0 <3.0.0"