function insertCountryAliases( data ) {
	Object.keys( aliases ).forEach( source => {
		data[ source ] = data[ aliases[ source ] ];
	} );
	return data;
}
function insertCountryAliases( data ) {
	Object.keys( aliases ).forEach( source => {
		data[ source ] = data[ aliases[ source ] ];
	} );
	return data;
}
function insertCountryAliases ( data ) { Object . keys ( aliases ) . forEach ( source => { data [ source ] = data [ aliases [ source ] ] ; } ) ; return data ; }
Creates aliases. E.g. allows `uk` to be found by both `gb` and `uk`.
@param data
Creates aliases . E . g . allows uk to be found by both gb and uk .