add BCV Exchange Rate (#333)

add BCV Exchange Rate API

README.md

@@ -432,6 +432,7 @@
 | [1Forge](https://1forge.com/forex-data-api/api-documentation) | Forex currency market data | `apiKey` | Yes | Unknown |
 | [Amdoren](https://www.amdoren.com/currency-api/) | Free currency API with over 150 currencies | `apiKey` | Yes | Unknown |
 | [Bank of Russia](https://www.cbr.ru/development/SXML/) | Exchange rates and currency conversion | No | Yes | Unknown |
+| [BCV (Banco Central de Venezuela) Exchange rate](https://bcv-api.rafnixg.dev/docs) | Exchange rates of the BCV (Central Bank of Venezuela) API | `apiKey` | Yes | No |
 | [Currencyapi](https://currencyapi.com) | Currency Conversion API and cryptocurrency prices, updated minutely | `apiKey` | Yes | Yes |
 | [Currency-api](https://github.com/fawazahmed0/currency-api#readme) | Free Currency Exchange Rates API with 150+ Currencies & No Rate Limits | No | Yes | Yes |
 | [CurrencyFreaks](https://currencyfreaks.com/) | Provides current and historical currency exchange rates with free plan 1K requests/month | `apiKey` | Yes | Yes |