Get the most recent height value.On success, the callback function will be provided with a `height` object containing the height `value`, and the `startDate` and `endDate` of the height sample. *Note: startDate and endDate will be the same as height samples are saved at a specific point in time.*```javascriptAppleHealthkit.getLatestHeight(null,(err:string,results:Object)=>{if(err){console.log("error getting latest height: ",err);return;}console.log(results)});``````javascript{value:72,startDate:'2016-07-08T12:00:00.000-0400',endDate:'2016-07-08T12:00:00.000-0400'}```