title: "error TS2694: Namespace 'angular' has no exported member 'xxx'" after upgrading @types/angular
body: <p>After upgrading angular and @types/angular version to version 1.6.x I have lots of TS2694 errors:</p>
  
  <pre><code>error TS2694: Namespace 'angular' has no exported member 'material'
  error TS2694: Namespace 'angular' has no exported member 'ui'
  error TS2694: Namespace 'angular' has no exported member 'translate'
  </code></pre>
  
  <p>This worked fine before changing the version number.</p>
  
  <p>What could cause the issue?</p>