Fix SPM support to explicitly include `CountryPicker.bundle` as a resource, otherwise `countryCodes.json` may not be included.  Because of the `guard let` on line 188 of `CountryPicker.swift`, failure to load the JSON silently fails and returns an empty set.
Fix SPM support to explicitly include `CountryPicker.bundle` as a resource, otherwise `countryCodes.json` may not be included.  Because of the `guard let` on line 188 of `CountryPicker.swift`, failure to load the JSON silently fails and returns an empty set.

4taras4/CountryCode,4taras4/CountryCode,4taras4/CountryCode