ISO3166 TUR is not updated

[pghtimwilson]

Türkiye
TR
TUR

Source
https://en.wikipedia.org/wiki/Turkey
https://en.wikipedia.org/wiki/ISO_3166-2:TR

[bellemam]

This:
https://github.com/schourode/iso3166/blob/master/Country.cs#L251
would indeed need to be updated to match
https://www.iso.org/obp/ui/#iso:code:3166:TR

[bellemam]

Added to #36