message: fix: use set to set registration responses
diff: @@ -4,6 +4,7 @@ import { alias, not } from '@ember-decorators/object/computed';
  import { service } from '@ember-decorators/service';
  import Component from '@ember/component';
  import { assert } from '@ember/debug';
  +import { set } from '@ember/object';
  import { task, TaskInstance, timeout } from 'ember-concurrency';
  import Toast from 'ember-toastr/services/toast';
  @@ -223,9 +224,10 @@ export default class DraftRegistrationManagerComponent extends Component.extend(
  .mapBy('registrationResponseKey')
  .filter(Boolean)
  .forEach(registrationResponseKey => {
  - Object.assign(
  + set(
  registrationResponses,
  - { [registrationResponseKey]: changeset!.get(registrationResponseKey) },
  + registrationResponseKey,
  + changeset!.get(registrationResponseKey),
  );
  });
  }
  