AngularDart的材质进度条

Question

错误：包material_progress没有匹配＆gt; = 1.0.0＆lt; 2.0.0的版本派生自： - your_next_startup取决于版本^ 1.0.0 app_component.html

 `<material-progress [activeProgress]="10"
               [secondaryProgress]="30"></material-progress>

 <material-progress [indeterminate]="true"></material-progress>`

app_component.dart

import 'package:angular2/angular2.dart';
import 'package:angular_components/angular_components.dart';
import 'package:your_next_startup/app_header/app_header.dart';


 @Component(
  selector: 'my-app',
  styleUrls: const ['app_component.css'],
  templateUrl: 'app_component.html',
  directives: const [
CORE_DIRECTIVES,
materialDirectives,
MaterialProgressComponent,
AppHeader,
],
  providers: const [materialProviders],
)
class AppComponent {

}