Log Message:
py-braintree: updated to 4.26.0

4.26.0

Remove usage of standard library deprecated cgi module. Note: this will break \ 
integrations on versions of Python below 3.2. However, this is NOT a breaking \ 
change to this library, due to our current support of Python 3.5+.
Add PackageDetails class.
Add packages to Transaction attributes.
Add package_tracking method to TransactionGateway to make request to add \ 
tracking information to transactions.
Add process_debit_as_credit to credit_card field in options field during \ 
Transaction create.
Deprecate three_d_secure_token in favor of three_d_secure_authentication_id
Add upc_code, upc_type, and image_url to line_items in transaction
Deprecate venmo_sdk_session and venmo_sdk_payment_method_code