docs: function getPlatformVersion (platformRoot) {
      var versionFile = path.join(platformRoot, 'cordova/version');
  
      if (!fs.existsSync(versionFile)) {
          return null;
      }
  
      var version = shell.cat(versionFile).match(/VERSION\s=\s["'](.*)["'];/m);
      return version && version[1];
  }