v2.4 Consolidate common functionality between AIM and CIM

The current version of the AuthorizeNet API has a lot of improvements that allow common actions (auth, capture, refund, void) to have common endpoints and transaction types between AIM and CIM. This release leverages those changes to make the AuthorizeNet driver a lot cleaner and simpler to maintain.

v2.3 Option to automatically attempt a void if refund fails

Authorize.Net rejects a refund if a transaction has not yet been settled. This release introduces an optional flag that can be passed to a refund request that will attempt a void if this condition is met.

Pass voidIfRefundFails = true to enable this functionality.

v2.2 Make CVV an optional field

Merge pull request #10 from anushr/optional-cvv

XOL-2776 Make CVV optional

v2.1.1 Workaround for duplicate profile when max card limit reached

Merge pull request #11 from rushi/CS-137

CS-137 Cannot process payment for customer that has 10 saved cards and is using existing saved credit card