Bump to v1.2.3.
Bump to v1.2.3.

NZRS/dnscheck,NZRS/dnscheck,NZRS/dnscheck,dotse/dnscheck,NZRS/dnscheck,dotse/dnscheck,dotse/dnscheck,dotse/dnscheck,NZRS/dnscheck,NZRS/dnscheck,dotse/dnscheck,dotse/dnscheck