How to add aurelia-animator-css to a cli-created project <p>I created a new project using aurelia cli. I npm installed aurelia-animator-css and added <code>aurelia.use.plugin('aurelia-animator-css');</code> to main.js. However aurelia-animator-css never loads. What else do I need to do? I assume I have to edit aurelia.json, but I'm not sure what to add.</p>