title: Updating stackblitz Angular version to the latest
body: <p>I updated this stackblitz <a href="https://stackblitz.com/edit/template-driven-form-demo-bnezpz?file=app/user-form/user-form.component.ts" rel="noreferrer">https://stackblitz.com/edit/template-driven-form-demo-bnezpz?file=app/user-form/user-form.component.ts</a></p>
  
  <p>to the latest angular version by pressing the refresh button in the dependencies tab.</p>
  
  <p>The result is that it keeps asking me to install core-js, but it doesn't matter how many times I press install, it just keeps popping up and asking me to install core-js. What's wrong here?</p>