title: How to specify target platform ios version number in Codemagic
body: <p>I am trying to build ios version of my app on Codemagic without a Mac. The build fails with the following messages.</p>
  
  <pre><code> [!] Automatically assigning platform `iOS` with version `8.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.
  </code></pre>
  
  <pre><code>[!] CocoaPods could not find compatible versions for pod "flutter_facebook_login":
    In Podfile:
      flutter_facebook_login (from `.symlinks/plugins/flutter_facebook_login/ios`)
  
  Specs satisfying the `flutter_facebook_login (from `.symlinks/plugins/flutter_facebook_login/ios`)` dependency were found, but they required a higher minimum deployment target.
  </code></pre>
  
  <p>It seems that ios version requirement of flutter_facebook_login package is higher than ios 8. I think it will be solved if I can specify a higher ios version.
  How can I solve this issue? </p>