title: how to add vertical itext using fabric js
body: <p>I want to enter vertical fonts in IText object.
  like this:</p>
  
  <pre><code>v
  e
  r
  t
  i
  c
  a
  l
  </code></pre>
  
  <p>Please help!</p>
  
  <p><img src="https://i.stack.imgur.com/DKYZq.png" alt=""></p>