title: Typescript Object destructuring results in "Property assignment expected."
body: <p>I am transitioning a project from Babel to Typescript and receive the following compiler error:</p>
  
  <pre><code>error TS1136: Property assignment expected.
  </code></pre>
  
  <p>from code that looks like this:</p>
  
  <pre><code>var auth = {...this.props.auth};
  </code></pre>
  
  <p>This code previously worked fine under Babel, but causes the error above when attempting to compile via Typescript. Is object destructuring different in Typescript?</p>