title: What is the meaning of the version numbers in an output of "pod outdated"?
body: <p>I have executed "pod outdated" for my project. This is the output:</p>
  
  <pre><code>Analyzing dependencies
  The following pod updates are available:
  - Kingfisher 4.0.0 -&gt; 4.0.0 (latest version 4.2.0)
  - Lokalise 0.7.0 -&gt; 0.7.0 (latest version 0.7.1)
  - LokaliseLiveEdit 0.2.2 -&gt; 0.2.2 (latest version 0.2.3)
  - Realm 3.0.0 -&gt; 3.0.0 (latest version 3.0.2)
  - RealmSwift 3.0.0 -&gt; 3.0.0 (latest version 3.0.2)
  - SwiftLint 0.23.0 -&gt; 0.23.0 (latest version 0.24.0)
  - SwiftyJSON 3.1.4 -&gt; 3.1.4 (latest version 4.0.0)
  - Tabman 1.0.6 -&gt; 1.0.6 (latest version 1.0.7)
  </code></pre>
  
  <p>What is the meaning of the version numbers which are presented three times per line?</p>