title: Get "supportLibVersion" , "playServicesVersion" and "androidMapsUtilsVersion" Value in configuration react-native-maps
body: <p>I am installing <code>react-native-maps</code>. In the installation guide, on <a href="https://github.com/react-native-community/react-native-maps/blob/master/docs/installation.md#build-configuration-on-android" rel="nofollow noreferrer">Build configuration on Android</a> in Section 3.1, it shows:</p>
  <pre><code>buildscript {
      ext {
          buildToolsVersion = &quot;xxx&quot;
          minSdkVersion = xxx
          compileSdkVersion = xxx
          targetSdkVersion = xxx
          supportLibVersion = &quot;xxx&quot;
          playServicesVersion = &quot;xxx&quot; // or set latest version
          androidMapsUtilsVersion = &quot;xxx&quot;
      }
  }
  ...
  </code></pre>
  <p>How can i get  <code>supportLibVersion</code> , <code>playServicesVersion</code>  and <code>androidMapsUtilsVersion</code> values?</p>