SP-883 Python 5.0.3 - Pydantic validation

Author: mwarzybok-sumoheavy

src/bitpay/models/invoice/invoice_refund_address.py

@@ -1,6 +1,7 @@
 """
 InvoiceRefundAddress
 """
+
 from datetime import datetime
 from typing import Union
 from pydantic import field_serializer