ember-count-up using 3rd party js

components.count-hey.js

import Ember from 'ember';

export default Ember.Component.extend({
  done(){
   this.sendAction("onComplete");
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  startVal: 0,
  endVal: 3,
  actions:{
  update(){
      let temp = this.get("endVal") + Math.floor((Math.random() * 100) + 1);
      this.set("endVal", temp);
    },
    done(){
      
      this.set("startVal", this.get("endVal"));
    }
  }
});

templates.application.hbs

start value {{startVal}} end value {{endVal}} <br> <button {{action "update"}}>update</button> <br>
{{count-hey startVal=startVal endVal=endVal duration=1 onComplete=(action "done")}}
<br>
<br>
{{outlet}}
<br>
<br>

templates.components.count-hey.hbs

{{count-up
  startVal=startVal
  endVal=endVal
  duration=duration
  onComplete=(action done)
   }}
  
{{yield}}

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-countup": "0.0.5"
  }
}