Roadmap: Update to Angular 9 about ngx-wig HOT 8 CLOSED

> Undecorated classes with DI migration.
  As of Angular 9, it is no longer supported to use Angular DI on a class that does not have an Angular decorator.
  Read more about this here: https://v9.angular.io/guide/migration-undecorated-classes

    This migration uses the Angular compiler internally and therefore projects that no longer build successfully after the update cannot run the migration. Please ensure there are no AOT compilation errors and rerun the migration. The following project failed: src/tsconfig.app.json
    Error: error TS100: Error during template compile of 'AppModule'
      Function calls are not supported in decorators but 'provideButtons' was called in 'NgxWigModule'
        'NgxWigModule' calls 'provideButtons'.


    Could not migrate all undecorated classes that use dependency
    injection. Some project targets could not be analyzed due to
    TypeScript program failures.

ngx-wig/projects/ngx-wig/src/lib/config.ts[6, 13]: Use an interface instead of a type literal.
ngx-wig/projects/ngx-wig/src/lib/config.ts[14, 13]: Use an interface instead of a type literal.