Updates to the currency provider (#213)

## Description



## Checklist
- [ ] Updated CHANGELOG files
- [ ] Updated Documentation
- [ ] Unit Tests Created
- [ ] php-cs-fixer

src/SonsOfPHP/Component/Money/CurrencyProvider/CurrencyProvider.php

@@ -15,7 +15,24 @@ final class CurrencyProvider extends AbstractCurrencyProvider
 {
     public function getCurrencies(): iterable
     {
-        // @todo Add all the currencies
+        yield Currency::AED(784, 2);
+        yield Currency::AFN(971, 2);
+        yield Currency::ALL(8, 2);
+        yield Currency::AMD(51, 2);
+        yield Currency::ANG(532, 2);
+        yield Currency::AOA(973, 2);
+        yield Currency::ARS(32, 2);
+        yield Currency::AUD(36, 2);
+        yield Currency::AWG(533, 2);
+        yield Currency::AZN(944, 2);
+
+        yield Currency::CAD(124, 2);
+        yield Currency::CHF(756, 2);
+        yield Currency::CNY(156, 2);
+        yield Currency::EUR(978, 2);
+        yield Currency::JPY(392, 0);
+        yield Currency::RUB(643, 0);
         yield Currency::USD(840, 2);
+        yield Currency::USN(997, 2);
     }
 }