RangeError

### :information_source: Info
Version 0.14.1

### :speech_balloon: Description
PS D:\FlutterProj\talalaeva> flutter pub run flutter_launcher_icons
Deprecated. Use `dart run` instead.
════════════════════════════════════════════
FLUTTER LAUNCHER ICONS (v0.14.1)
════════════════════════════════════════════

• Creating default icons Android
• Adding a new Android launcher icon
• Creating mipmap xml file Android

✕ Could not generate launcher icons
RangeError (length): Invalid value: Not in inclusive range 0..863: 1020

### :scroll: Pubspec.yaml
flutter_launcher_icons:
android: "launcher_icon"
ios: true
image_path: "assets/mainicon.png"
image_path_ios: "assets/mainicon.png"
remove_alpha_ios: true

Reproduce the failure with the reported flutter_launcher_icons configuration and assets/mainicon.png, using the package's documented entry point. Trace the Android icon-generation step that reports the RangeError, then verify that launcher icons generate successfully for the requested Android and iOS targets without the error.

Written by the indexing model from the issue text.