title: How do I resolve type error this.merge is not a function trying to run Mozart app?
body: <p>I'm trying to start a Mozart app, but nothing is rendering and I'm getting the error...</p>
  
  <pre><code>TypeError: this.merge is not a function 
  helpers = this.merge(helpers, Handlebars.helpers); data = data || {};
  </code></pre>
  
  <p>Nothing obviously related has changed - ie. haven't changed the templates etc so it's hard to see what's wrong. Have tried an npm install and re-run to no avail. Anyone hit this problem?</p>