Non-standard language tags for "Belarusian" and "English (Pakistan)" locales

[alx-mag]

Faker uses tags by and en-PAK for these locales. But the standard ones are be (or be-BY) and en-PK, see the standard locales list. These non-standard tags are usable with Faker but Java does not recognize them:

import java.util.Locale;

public class Test {

    public static void main(String[] args) {
        System.out.println(getLocaleDisplayName("by"));     // by
        System.out.println(getLocaleDisplayName("be-BY"));  // Belarusian (Belarus)
        System.out.println(getLocaleDisplayName("be"));     // Belarusian

        System.out.println(getLocaleDisplayName("en-PAK")); // pak
        System.out.println(getLocaleDisplayName("en-PK"));  // English (Pakistan)
    }

    static String getLocaleDisplayName(String languageTag) {
        return Locale.forLanguageTag(languageTag)
                .getDisplayName(Locale.ENGLISH);
    }
}

I think there should be added be.yml (or be-BY.yml) and en-PK.yml. The by.yml and en-PAK.yml can be left for backward compatibility.

[bodiam]

Thanks for reporting! Would you be willing to do a PR for this? We could deprecate the non standard ymls, and remove them next release

[bodiam]

I guess this can be closed now that #598 has been merged.