Merge pull request #10 from paywithextend/fix/camel-case-for-transaction-id-param

use camel case for txn id param

Author: byjoh

extend/resources/receipt_attachments.py

@@ -39,5 +39,5 @@ async def create_receipt_attachment(
 
         return await self._request(
             method="post_multipart",
-            data={"transaction_id": transaction_id},
+            data={"transactionId": transaction_id},
             files={"file": file})