Feature/latest ios icon sizes (fixes #528)

[lacostej]

Fixes #528

Tentative fix. Someone wants to test it? In your pubspec.yaml

I can squash the branch later.

Instead of

  flutter_launcher_icons: "^0.13.1"

use

  # "^0.13.1" + fix for https://github.com/fluttercommunity/flutter_launcher_icons/issues/528
  flutter_launcher_icons:
    git:
      url: [email protected]:PilotMade/flutter_launcher_icons.git
      ref: feature/latest_ios_icon_sizes

Tested with Xcode 15.2 here.