v0.4.0

What's Changed

• DE-934 Setup tests for a new site by @michalpierog in #30
• [DE-932] Release v0.4.0 by @maciej-nedza in #31
• DE-921 DE-922 Fix problem with interval units - interval units now can be nullable in various contexts, ExtendedIntervalUnit was renamed to ExpirationIntervalUnit, now ExpirationIntervalUnit is used in SubscriptionCustomPrice, CreatePrepaidComponentPricePoint, CreateProductPricePoint, CreateOrUpdateProduct, PrepaidComponent, ProductPricePoint and Product for expirationIntervalUnit property. This enum has additional value of never (this has not changed)
• DE-921 DE-924 Reworked vaults - CurrentVault enum was renamed to AllVaults and filled with previously missing values. BankAccountVault was filled with missing values. ApplePayVault was added with the vault supporting this payment method. CreditCardVault was added with vaults supporting this payment method. PayPalVault was added with vaults supporting this payment method. Models for respective payment profiles types now use respective enums.
• DE-910 Distinguish response payment profiles based on the paymentType. PaymentProfileResponsePaymentProfile was renamed to PaymentProfile.ApplePayPaymentProfile, and PayPalPaymentProfile were added as possible PaymentProfile in PaymentProfileResponse. Fixed a bug, when response payment profile couldn't be deserialized due to missing fields.
• Added publicUrlExpires_on to the Invoice
• Added achLateReject to the InvoiceRefund
• Added tax-related properties to InvoiceTaxComponentBreakout and InvoiceTax
• SUB-4037 Add taxIncluded to ComponentCustomPrice. Added request model for Activate Event-Based Component endpoint, SubscriptionComponentActivateEventBasedComponent
  productFamilyId in endpoint paths parameters is now string, to enable searching by both handle and id
• [DE-932] Rename Chargify API by @michalpierog in #32

Full Changelog: v0.3.0...v0.4.0