Support for ISO 3166 Country A3 Codes & Numeric Codes

[DevJonie]

Hi everyone,
I'm adding support for A3 codes & Numeric codes.

I'm struggling with a name for the A3 codes field 😅 . Not very good with nomenclature.
The existing A2 code field is named countryShortCode.
Any Ideas?

I was actually thinking of renaming the A2 field to alpha2Code, and name A3 field alpha3Code. Its a breaking change but we've already started breaking things 😅 .

I need ideas 😅

[frankodoom]

@DevJonie I pushed the enhancement improvements you made v1.2.0 so i think we can now start looking at the A3 and Numeric Codes, I also created some issues for some nice to have features.