Log Message:
finance/ruby-braintree: update to 4.8.0

4.8.0 (2022-07-25)

* Add ach_return_responses to Transaction for search results that search for
  transaction that have ach return response related data.
* Add ach_return_responses_created_at range field to to TransactionSearch
* Add reason_code to TransactionSearch to search for reason codes on
  transaction that have ach return responses associated with them.
* Add 'ExchangeRateQuoteAPI'
* Add LiabilityShift class and liability_shift field to RiskData
* Replace generic errors with api_error_response

4.7.0 (2022-04-01)

* Add AchReturnCode to transaction object
* Add retried boolean to Transaction