fix: add missing log level fatal (#704)

* add missing log level
diff --git a/rlog/log.go b/rlog/log.go
index 3e3dfd3..1d850c3 100644
--- a/rlog/log.go
+++ b/rlog/log.go
@@ -57,6 +57,8 @@
 		r.logger.SetLevel(logrus.WarnLevel)
 	case "error":
 		r.logger.SetLevel(logrus.ErrorLevel)
+	case "fatal":
+		r.logger.SetLevel(logrus.FatalLevel)
 	default:
 		r.logger.SetLevel(logrus.InfoLevel)
 	}
@@ -112,6 +114,8 @@
 		l.logger.SetLevel(logrus.WarnLevel)
 	case "error":
 		l.logger.SetLevel(logrus.ErrorLevel)
+	case "fatal":
+		l.logger.SetLevel(logrus.FatalLevel)
 	default:
 		l.logger.SetLevel(logrus.InfoLevel)
 	}