Use winston for logging

src/util.ts

@@ -7,10 +7,7 @@ export const logger = winston.createLogger({
   transports: [new winston.transports.Console()],
   format: format.combine(
     format.errors({ stack: true }),
-    format.printf(
+    format.printf(({ level, message }) => `${level}: ${message}`)
-      ({ level, message, stack }) =>
-        `${level}: ${message}${stack ? "\n" + stack : ""}`
-    )
   ),
 });