refactor: show more lines of stack trace

src/socket.io/index.js

@@ -238,5 +238,5 @@ Sockets.warnDeprecated = (socket, replacement) => {
 			replacement: replacement,
 		});
 	}
-	winston.warn('[deprecated]\n ' + (new Error('-').stack.split('\n').slice(2, 3).join('\n')) + '\n     use ' + replacement);
+	winston.warn('[deprecated]\n ' + (new Error('-').stack.split('\n').slice(2, 5).join('\n')) + '\n     use ' + replacement);
 };