Error type String is not a subtype of type 'Map<dynamic, dynamic>'

[esthrim]

When i run this command

$ flutter pub get $ flutter pub pub run flutter_launcher_icons:main

it shows error like this
Macs-Mac-mini:ultra_approval macmini1$ flutter pub pub run flutter_launcher_icons:main Unhandled exception: type 'String' is not a subtype of type 'Map<dynamic, dynamic>' #0 loadFlutterIconsConfig (package:flutter_launcher_icons/main.dart:42:3) #1 createIcons.<anonymous closure> (package:flutter_launcher_icons/main.dart:9:18) #2 _RootZone.runUnary (dart:async/zone.dart:1379:54) #3 _FutureListener.handleValue (dart:async/future_impl.dart:129:18) #4 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45) #5 Future._propagateToListeners (dart:async/future_impl.dart:671:32) #6 Future._complete (dart:async/future_impl.dart:476:7)

flutter doctor
Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel beta, v0.8.2, on Mac OS X 10.13.6 17G65, locale en-US) [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3) [✓] iOS toolchain - develop for iOS devices (Xcode 10.0) [✓] Android Studio (version 3.2) [✓] VS Code (version 1.27.2) [✓] Connected devices (1 available)

[esthrim]

Sorry, its my fault i have typo in my pubspec.yaml it solved.