config save: Print update confirmation

src/conf.rs

@@ -86,6 +86,7 @@ pub fn handle_command(data: Data, command: Subcommand) -> Result<(), GcliError>
 		}
 		Subcommand::Save => {
 			confy::store(APP_NAME, None, &data.cfg).expect("unable to write config");
+                        println!("Configuration updated!");
 		}
 		Subcommand::Default => {
 			confy::store(APP_NAME, None, Config::default()).expect("unable to write config");