title: Alamofire - not be code signed because its settings don't specify a development team in Xcode 8
body: <p>I hit the error on below on Xcode 8, can everyone help to solve it.
  My application need to support iOS 8 and above.</p>
  
  <p>Alamofire will not be code signed because its settings don't specify a development team.
  “Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.</p>
  
  <p>Thanks</p>