title: How can I get the latest version of ConstraintLayout for Android?
body: <p>When I try to use <code>ConstraintLayout</code> in my layout <code>content_main.xml</code>, I get the following message:</p>
  
  <blockquote>
    <p>Using version 1.0.0-alpha5 of the constraint library, which is obsolete</p>
  </blockquote>
  
  <p>I am currently using the following library dependency:</p>
  
  <pre><code>compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha5'
  </code></pre>
  
  <p>How can I get the latest version number of constraint layout?</p>