Change log:
2020-11-19 - 7.5.0 - Added CampaignType for CampaignCreate, Changed existing CampaignType to CampaignExtensionType as it was not correct
2020-10-29 - 7.4.0 - Throw ArgumentNullException when url parameter is not defined.
2020-10-19 - 7.3.0 - Add campaign and campaign_id in Voucher validation response. Add is_referral_code in voucher model.
2020-09-17 - 7.2.1 - Fixed returning ProductSKuList in async implementation.
2020-09-15 - 7.2.0 - Added Support for Consents. Drop deprecated API Versions. Changed Amounts from int to long.
2020-08-12 - 7.1.0 - Added Barcode property for VoucherAssets. Introduced ValidationError and BusinessValidationRuleError to support custom error messages.