title: Type 'NSAttributedStringKey' (aka 'NSString') has no member 'font'
body: <p>Just updated pods for xcode 9 and I'm getting the error below for <a href="https://github.com/evgenyneu/Cosmos" rel="noreferrer">Cosmos</a>.</p>
  
  <p><a href="https://i.stack.imgur.com/BAOzd.png" rel="noreferrer"><img src="https://i.stack.imgur.com/BAOzd.png" alt="enter image description here"></a></p>
  
  <blockquote>
    <p>Type 'NSAttributedStringKey' (aka 'NSString') has no member 'font'</p>
  </blockquote>