Countries v4.0.0

Breaking changes

• merge demonym into demonyms (#369)
• remove property demonym (#369)

Before

"demonym": "Irish",
...
"demonyms": {
    "fra": {
        "f": "Irlandaise",
        "m": "Irlandais"
    }
}

After

"demonyms": {
    "eng": {
        "f": "Irish",
        "m": "Irish"
    },
    "fra": {
        "f": "Irlandaise",
        "m": "Irlandais"
    }
}

Additions

• add translated demonyms in French (#343)
• add DPRK as an alternative spelling to North Korea (#371)
• add altSpelling to Macedonia (#377)

Changes

• update TypeScript types to v3 (#376)

Fixes

• fix Curaçao calling code (#370)
• fix wrong Iran language code, update the language label (#374)
• fix Spanish spelling for Haiti (#380)