use whisper.json as default batch file path

Author: ysmood

main.go

@@ -69,8 +69,8 @@ func main() { //nolint: funlen,gocyclo,cyclop
 
 	genKeyFile := flags.String("gen-key", "", "Generate a key pair and save to the specified path.")
 
-	batchEncrypt := flags.String("be", "", "Encrypt all files in the batch config file.")
-	batchDecrypt := flags.String("bd", "", "Decrypt all files in the batch config file.")
+	batchEncrypt := flags.String("be", "whisper.json", "Encrypt all files in the batch config file.")
+	batchDecrypt := flags.String("bd", "whisper.json", "Decrypt all files in the batch config file.")
 
 	err := flags.Parse(os.Args[1:])
 	if err != nil {