Create contrete type for TransferRecipient

[gray-adeyi]

Currently, client methods like PaystackClient.transferRecipients.getTransferRecipients, return a PaystackResponse whose data may be a record or an array of records leaving consumers of this package to have to infer in implement types in their project. implement a TransferRecipient type so that client methods like PaystackClient.transferRecipients.getTransferRecipients may return PaystackResponse<TransferRecipient[]> and PaystackClient.transferRecipients.getTransferRecipient may return PaystackResponse<TransferRecipient>.

Prerequisites

• a paystack account (to obtain a secret key)
• using the paystack-cli to obtain a dump of transactions to determine fields and their types. See project documentation for more
• depend on Convert PaystackResponse to a generic type #34