How can I replace link_with with abstract_target?
<p>I updated the gem pod and I am now getting an error while compiline Signal-iOS. Here is the error I am getting:</p>

<blockquote>
  <p>[!] Invalid <code>Podfile</code> file: [!] The specification of <code>link_with</code> in
  the Podfile is now unsupported, please use target blocks instead..</p>
</blockquote>

<p>Here is the content of the Podfile:</p>

<pre><code>platform :ios, '8.0'
source 'https://github.com/CocoaPods/Specs.git'
link_with ["Signal", "SignalTests"]
</code></pre>

<p>I have absolutely no familiarity with CocosPod so this is gibberish to me. I spent time reading online docs, but there is a bit of conflicting information due to the recent changes and deprecation of commands. What is the recommended way to change the file so the project can build again?</p>