1.flutter sdk 升级以后-项目运行报错：
../../../AppData/Local/Pub/Cache/hosted/pub.dev/win32-4.1.4/lib/src/guid.dart:31:9: Error: Type 'UnmodifiableUint8ListView' not found.
final UnmodifiableUint8ListView bytes;
^^^^^^^^^^^^^^^^^^^^^^^^^
../../../AppData/Local/Pub/Cache/hosted/pub.dev/win32-4.1.4/lib/src/guid.dart:31:9: Error: 'UnmodifiableUint8ListView' isn't a type.
final UnmodifiableUint8ListView bytes;
^^^^^^^^^^^^^^^^^^^^^^^^^
2.需要升级 win32，查看win32 可升级的版本
flutter pub outdated
Package Name Current Upgradable Resolvable Latest
win32 *4.1.4 *4.1.4 5.6.1 5.6.1
3.在pubspec.yaml中
win32: ^5.6.1
4.更新
flutter clean
flutter pub upgrade
