v2.0.0

Welcome to release 2.0.0 of Buckaruby!

This release contains a lot of refactoring and clean up, so make sure to read the list of breaking changes when upgrading from 1.x.

Changes:

• Security: use constant time comparison for signatures for preventing timing attacks.
• Retrieve the issuers using TransactionRequestSpecification request (see https://github.com/KentaaNL/buckaruby#get-issuers).
• Minimum Ruby version is 2.5.

Breaking changes:

• Remove class Buckaruby::Iban.
• Remove class Buckaruby::Ideal (see https://github.com/KentaaNL/buckaruby#get-issuers how to retrieve issuers).
• Remove class variable Buckaroo::Gateway.mode (live environment is now the default; see https://github.com/KentaaNL/buckaruby#usage how to configure the testing environment).
• Remove method Buckaruby::TransactionResponse#to_h.
• Rename parameter payment_issuer to issuer in Buckaruby::Gateway#setup_transaction.
• Rename parameters account_iban/bic/name to consumer_iban/bic/name in Buckaruby::Gateway#setup_transaction and Buckaruby::TransactionResponse.
• Rename method Buckaruby::Gateway#refundable? to #refundable_transaction?.
• Rename method Buckaruby::Gateway#cancellable? to #cancellable_transaction?.
• Rename method Buckaruby::Gateway#callback to #parse_push.
• Rename class Buckaruby::CallbackResponse to PushResponse.
• Rename method Buckaruby::TransactionResponse#refund_transaction_id to #refunded_transaction_id and move to responses that support it.
• Rename method Buckaruby::TransactionResponse#reversal_transaction_id to #reversed_transaction_id and move to responses that support it.
• Rename constant Buckaruby::PaymentMethod::BANCONTACT_MISTER_CASH to BANCONTACT