title: SDK Version Issue
body: <p>i'm getting the Warning when i upload my application through xcode 8.x.</p>
  
  <blockquote>
    <p>Xcode for future app deliveries." WARNING ITMS-90725: "SDK Version
    Issue. In July 2018, iOS app updates submitted to the App Store will
    need to be built with the iOS '11.0' SDK or later, included in Xcode
    [9.0] or later. Make sure to update Xcode for future app deliveries."</p>
  </blockquote>
  
  <p>My project was developed in old swift 2.X language and some of the module in objective-c..</p>
  
  <p>should i convert whole project to the latest swift 4.x and update all sdks?</p>