heart rate functionnality

src/main.rs

@@ -23,6 +23,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
 
     println!("{}", infinitime_rs::get_firmware_version(&infinitime).await);
     println!("{}", infinitime_rs::get_battery_level(&infinitime).await);
+    println!("{}", infinitime_rs::get_heart_rate(&infinitime).await);
 
     Ok(())
 }