@lastValue not assignable to parameter of type 'never' TypeScript error

[jonopus]

TS Definition not accepting
Argument of type '"someTask"' is not assignable to parameter of type 'never'.ts(2345)

import { on } from '@ember-decorators/object';
import { inject as service } from '@ember-decorators/service';
import Component from '@ember/component';
import { TaskInstance } from 'ember-concurrency';
import { lastValue, task } from 'ember-concurrency-decorators';
import StuffCollection from '../models/stuffs/stuff-collection';

export default class Thing extends Component {
  @service('store')
  store: any;

  @on('init')
  getProjects () {
    //@ts-ignore https://github.com/machty/ember-concurrency-decorators/issues/30
    this.getStuffTask.perform();
  }

  @task
  *getStuffTask(): IterableIterator<TaskInstance<Promise<StuffCollection>>> {
    const projects = yield this.store.queryRecord('stuff', {});
    return projects;
  }

  @lastValue('getStuffTask') // error here `Argument of type '"someTask"' is not assignable to parameter of type 'never'.ts(2345)`
  collection?: StuffCollection;
}

[buschtoens]

This should be fixed by the next beta release (1.0.0-beta.2).