code: function( url, options, callback ) {
  	if ( typeof options === "function" ) {
  		callback = options;
  		options = null;
  	}
  	options = options || {};
  	getTags( url, options, function( err, tagArray ) {
  		var latest;
  		if ( !err && Array.isArray( tagArray ) && tagArray.length > 0 ) {
  			tagArray.sort( function( a, b ) {
  				try {
  					return semver.rcompare( a.name, b.name );
  				}
  				catch ( err2 ) {
  					return -1;
  				}
  			} );
  			latest = tagArray[0];
  		}
  		callback( err, latest );
  	} );
  }
docs: Uses node's semver package to work out the latest tag value
  @function getLatestTag
  @memberof util
  @param {string} url - Project URL to get latest tag for
  @param {object} options - Options object
  @param {function} [callback] - Complete callback