added notification test

src/main.rs

@@ -24,6 +24,7 @@ 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);
+    infinitime_rs::send_notification(&infinitime).await;
 
     Ok(())
 }