Add Laravel 5.6 support

1.6.0

Add Laravel 5.6 support

Fixed PayPal API Certificate Authentication

1.5.9

Apply fixes from StyleCI (#180)

Specify subtotal & shipping charges for SetExpressCheckout

1.5.8

Ability to specify 'subtotal' and 'shipping' costs for express checko…

1.5.7

Add missing AMT parameter for DoReferenceTransaction.

1.5.6

Added following PayPal ExpressCheckout API implementation:

• DoReferenceTransaction
• GetTransactionDetails.
• DoReauthorization.

1.5.5

• Add support for Laravel 5.5
• Drop support for Laravel 5.0.

Fix Laravel 5.1 compatibility

Remove call to filter() and replace with simpler if statement (#111)

Remove call to filter() and replace with simpler if statement

Removed global helpers & fixed error with Adaptive Payments

1.5.2

Refactoring

Fix error when transaction is partially refunded

1.5.1

Fix error with Partial refund (#95)

Fix error when parsing IPN response

1.5.0

Fix error when parsing IPN response (#94)