Fix bug where `$item->getPrice()` was being used as the total amount rather than the unit amount (#70)
Fix bug where `$item->getPrice()` was being used as the total amount rather than the unit amount (#70)

Co-authored-by: Ross Whisson <93c29e80018bc0f815f97aa9388473ba60cf4067@thebrandagency.co>
thephpleague/omnipay-braintree