title: How to make vscode's emmet allow expanding all custom tags
body: <p>Previously when typing something in vscode like :-</p>
  
  <p><code>asd[TAB]
  dada[TAB]
  sasa[TAB]</code></p>
  
  <p>would expand into</p>
  
  <p><code>&lt;asd&gt;&lt;/asd&gt;
  &lt;dada&gt;&lt;/dada&gt;
  &lt;sasa&gt;&lt;/sasa&gt;</code></p>
  
  <p>but currently with the implementation of Emmet 2.0 this has changed.
  Now it allows expanding html related tags only like ul, li, div, span, etc.</p>
  
  <p>Please tell me if there's a way to obtain the functionality that I need.</p>