Log Message:
py-braintree: updated to 3.41.0

3.41.0
Deprecated LineItem/DiscountAmountMustBeGreaterThanZero error in favor of \ 
DiscountAmountCannotBeNegative
Deprecated LineItem/UnitTaxAmountMustBeGreaterThanZero error in favor of \ 
UnitTaxAmountCannotBeNegative
Add support for tax_amount field on transaction line_items
Add support for source_merchant_id on webhooks
Add find_all static method to TransactionLineItem class