Add xn--mgbah1a3hjkrd (موريتانيا) (#773)
Add xn--mgbah1a3hjkrd (موريتانيا) (#773)

See https://www.iana.org/reports/2019/xn--mgbah1a3hjkrd-report-20190108.html and https://www.iana.org/domains/root/db/xn--mgbah1a3hjkrd.html
publicsuffix/list,publicsuffix/list,publicsuffix/list,publicsuffix/list