title: Default value for typescript type alias
body: <p>Can typescript type alias support default arguments? For instance:</p>
  
  <pre><code>export type SomeType = {
      typename: string;
      strength: number;
      radius: number;
      some_func: Function;
      some_other_stat: number = 8; // &lt;-- This doesn't work
  }
  </code></pre>
  
  <p>The error is <code>A type literal property cannot have an initializer.</code></p>
  
  <p>I can't find documentation relating to this - <code>type</code> keyword is very obscure behind everything else that is also named type. Is there anything I can do to have default argument value for <code>type</code> in typescript?</p>