message: fix: don't clobber subject parent relationship
diff: @@ -10,7 +10,7 @@ export default class SubjectModel extends OsfModel {
  @belongsTo('subject', { inverse: 'children', async: false })
  parent?: SubjectModel;
  - @hasMany('subject', { inverse: 'parent', async: false })
  + @hasMany('subject', { inverse: 'parent' })
  children!: DS.PromiseManyArray<SubjectModel>;
  }
  