title: Carthage install of Eureka failing due to Swift Version
body: <p>Starting with a brand new project, I am trying to install <a href="https://github.com/xmartlabs/Eureka" rel="nofollow noreferrer">Eureka</a> through Carthage.  I set up a Cartfile with the specified line: <code>github "xmartlabs/Eureka" ~&gt; 3.0.0</code> as instructed.</p>
  
  <p>I then execute with:  <code>carthage update --platform iOS</code></p>
  
  <p>The build fails with the message: </p>
  
  <blockquote>
    <p>Task failed with exit code 65" with the further message that the
    project likely failed to compile.  Checking the log file as instructed
    I see the following: "error: SWIFT_VERSION '3.0' is unsupported,
    supported versions are: 4.0, 4.2, 5.0. (in target 'Eureka')</p>
  </blockquote>
  
  <p>I am using Xcode 10.2.1 and the new project defaults Swift Compiler Language  to Swift 5.  However, this is for the target of the new project.  I see in the error the version is 3.0 for target Eureka.  </p>
  
  <p>Do I need to change something else for the default running through the terminal?  Do I have some old version of a setting from Swift 3.0 hanging around somewhere?</p>