Retrieve `localized_country_name` in `find_groups()`

[benubah]

I guess that retrieving the full country name (localized_country_name in the meetup API) could be more useful than just the country code (country in the meetup API). You might want to retrieve both.

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Using the following code retrieves this for me in the find_group() function.

country = purrr::map_chr(res, "localized_country_name"),