Incorrect handling of GB alpha2 codes for main countries

[joh-ku]

When searching for countries.ByName("scotland") the return value is GB.

For Scotland the correct ISO-3166-2 code should be GB-SCT instead. Same applies for all other main countries in UK, which don't have a parent subdivision.

Those are:

1. England -> GB-ENG
2. Northern Ireland -> GB-NIR
3. Scotland -> GB-SCT
4. Wales -> GB-WLS

See https://www.iso.org/obp/ui/#iso:code:3166:GB.

I'm happy to provide a PR, if the change is accepted.

[biter777]

Ok
Do a pr pls, if u can

[ccoVeille]

My main concern is the fact the lib may return an ISO code with more than 2 characters. Some database or code may react badly, because value will exceed field capacity

So, what about a new method ? that will provide such an extended code that will return the existing 2 letter code except for these variants.

So keep returning iso code to GB for existing method. Scotland is part of GB after all.

If someone asks the country code of Scotland they would expect getting GB I think.

I'm a bit afraid of breaking change