perf: domain status use original case

[soxft]

whois-parser/util.go

Lines 72 to 82 in c102b4e

	func fixDomainStatus(status []string) []string {
	for k, v := range status {
	names := strings.Split(strings.TrimSpace(v), " ")
	status[k] = strings.ToLower(names[0])
	if status[k] == "not" && len(names) > 1 && strings.ToLower(names[1]) == "delegated" {
	status[k] = "not delegated"
	}
	}
	return status
	}

In the fixDomainStatus, all domain status is forcibly converted to lowercase to compare whether it is not delegated. I think domain status should be in the original case state. Users can convert case as they wish through strings.ToLower

[likexian]

Hello @soxft
Thanks for your works!