output reason

event/listeners/unhandledRejection.js

@@ -8,7 +8,8 @@ class unhandledRejectionListener extends Listener {
 		});
 	}
 
-	async exec(error) {
+	async exec(error, reason) {
+		console.error(reason);
 		return console.error(`\x1b[31mUncaught Promise Rejection: ${error}\x1b[37m`);
 	}
 }