feat(finance): add ISO 4217 numerical codes to Currency (#3404)

Author: Nfloc

src/definitions/finance.ts

@@ -18,7 +18,7 @@ export type FinanceDefinition = LocaleEntry<{
   credit_card: { [issuer: string]: string[] };
 
   /**
-   * Currencies including their name, code and symbol (e.g. `US Dollar` / `USD` / `$`).
+   * Currencies including their name, code, symbol and ISO numeric code (e.g. `US Dollar` / `USD` / `$` / '840').
    */
   currency: Currency[];
 

src/locales/el/finance/currency.ts

@@ -3,5 +3,6 @@ export default [
     name: 'Ευρώ',
     code: 'EUR',
     symbol: '€',
+    numericCode: '978',
   },
 ];