Changes to Get Transaction History

added the new charge credit enum value to the transactions/items/transaction_type/allOf[subschema #1: UserTransactionType] response property for the response status 200

added the optional property total_count to the response with the 200 status

added the optional property transactions/items/credit_rate_pence_per_kwh to the response with the 200 status

added the optional property transactions/items/creditable_kwh to the response with the 200 status

added the optional property transactions/items/plug_session_id to the response with the 200 status

added the optional property transactions/items/vehicle to the response with the 200 status

response property transactions/items/credit_pence deprecated

added the required property transactions/items/amount_minor_units to the response with the 200 status

added the required property transactions/items/currency to the response with the 200 status