bug: ember-mobiledoc-editor created lifecycle hook

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  editor: null,
  
  actions: {
    handleDidCreate(editor) {
      this.set('editor', editor);
    },
  },
});

templates.application.hbs

{{editor}}
<MobiledocEditor @did-create-editor={{action 'handleDidCreate'}}/>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2",
    "ember-mobiledoc-editor": "0.5.15"
  }
}