add owner country code attribute (#1565)

name says it all

src/Socket/groups.ts

@@ -335,6 +335,7 @@ export const extractGroupMetadata = (result: BinaryNode) => {
 		creation: +group.attrs.creation,
 		owner: group.attrs.creator ? jidNormalizedUser(group.attrs.creator) : undefined,
 		ownerJid: group.attrs.creator_pn ? jidNormalizedUser(group.attrs.creator_pn) : undefined,
+		owner_country_code: group.attrs.creator_country_code,
 		desc,
 		descId,
 		descOwner,

src/Types/GroupMetadata.ts

@@ -18,6 +18,7 @@ export interface GroupMetadata {
 	addressingMode: 'pn' | 'lid'
 	owner: string | undefined
 	ownerJid?: string | undefined
+	owner_country_code: string
 	subject: string
 	/** group subject owner */
 	subjectOwner?: string