Change value in response to update action on one way number mask

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  num: 0,
  actions: {
    update(unmaskedValue, value){
      let number = parseInt(unmaskedValue, 10);
      if(number > 15){
      	this.set('num', 15);
      } else {
        this.set('num', number);
      }
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>
{{one-way-number-mask value=num decimal=false update=(action 'update')}}

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2",
    "ember-inputmask": "0.6.8"
  }
}