Patch a gateway account

A generic endpoint that allows the patching of allow_apple_pay, allow_google_pay, block_prepaid_cards, notify_settings, email_collection_mode, corporate_credit_card_surcharge_amount, corporate_debit_card_surcharge_amount, corporate_prepaid_debit_card_surcharge_amount, allow_zero_amount, allow_moto, moto_mask_card_number_input, moto_mask_card_security_code_input, allow_telephone_payment_notifications, send_payer_ip_address_to_gateway, send_payer_email_to_gateway, integration_version_3ds, send_reference_to_gateway, allow_authorisation_api or worldpay_exemption_engine_enabled using a JSON Patch-esque message body.