missing Close Method

[jackhalf]

error:
D:\Go\pkg\mod\github.com\toolkits\pkg@v1.3.1\logger\config.go:37:32: cannot use sb (variable of type *syslogBackend) as type Backend in argument to log.SetLogging:
*syslogBackend does not implement Backend (missing Close method)
have close()
want Close()

please fix the code with Close() not close()