title: Konva: how to vertical centering text
body: <p>I'm try to build a Konva Text container with vertical centering of it's content;</p>
  
  <pre><code>var infoText = new Konva.Text({
    x: 0,
    y: 0,
    text: `my long long ... text`,
    fontSize: 18,
    fontFamily: 'Arial',
    width: 50,
    height: 50,
    align: 'center'
  });
  </code></pre>
  
  <p>I found the <em>align</em> property in the docs, but it can only make text centered horizontally. How can I center vertically?</p>