ember-flickity example [it's broken]

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

/* external css: flickity.css */

* { box-sizing: border-box; }

body { font-family: sans-serif; }

figure {
  display: block;
  margin: 0;
  padding: 0;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
}

.carousel {
  background: yellow;
}

.carousel figure {
	width: 100%;
}

.flickity-wrapper {
/*   min-height: 300px; */
}

.flickity-viewport {
  min-height: 300px;
}

.flickity-slider {
/*   min-height: 300px; */
}

templates.application.hbs

<p>For some reason, you have to set height on the .flickity-viewport</p>

{{#em-flickity class="carousel" showSlides=true}}

	<figure class="my-slideshow__item">
  	<img src="https://placehold.it/1600x900/ff0066" />
  </figure>
  
	<figure class="my-slideshow__item">
  	<img src="https://placehold.it/1600x900/ffc0cb" />
  </figure>

{{/em-flickity}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "flikcityCSS":"https://npmcdn.com/flickity@2/dist/flickity.css",
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-flickity": "0.1.5"
  }
}