feat: Replace country-regex with country-iso-search

[camdecoster]

Description

Replace country-regex library with country-iso-search.

Part of #7026.

Changes

• Use new library
• Add custom country codes to be included in country search
• Remove deprecation warning
• Update schema and types
• Add new tests

Testing

• Be on this branch
• Open the geo_country-names mock in Plotly devtools
• Open browser devtools console
• Note that there are no messages mentioning an unrecognized country

Notes

• country-iso-search is a new Plotly maintained library
• The deprecation notice was to prepare people for this specific library change
• This change is necessary because country-regex was derived from a GPL-licensed source

[emilykl]

@camdecoster Can you add a comment explaining why these custom codes are needed?

[camdecoster]

Yeah, that's a good idea.

[emilykl]

@camdecoster Are any user-facing changes expected as part of this switch (i.e. either country names/codes which were accepted previously and now are not, or vice-versa)?

[camdecoster]

@emilykl there could be some strings that matched before that don't anymore, but that should be very few. I added a bunch of aliases in the new library that should cover most versions of country names.

On the other side, there a lot of new aliases that will match (including the flags). Overall, I think it's a new improvement, even if there are a few regressions (which can be fixed in updates to the new library).

[camdecoster]

Yeah, that's a good idea.

[emilykl]

@camdecoster Cool, no objections, just wanted to make sure it's clear what the impact will be in practice.