Add support for App Store Server API v1.13 and App Store Server Notifications v2.13

    https://developer.apple.com/documentation/appstoreserverapi/app_store_server_api_changelog
    https://developer.apple.com/documentation/appstoreservernotifications/app_store_server_notifications_changelog

Author: alexanderjordanbaker

appstoreserverlibrary/models/JWSRenewalInfoDecodedPayload.py

@@ -1,5 +1,5 @@
 # Copyright (c) 2023 Apple Inc. Licensed under MIT License.
-from typing import Optional
+from typing import List, Optional
 
 from attr import define
 import attr
@@ -167,4 +167,11 @@ class JWSRenewalInfoDecodedPayload(AttrsRawValueAware):
     rawOfferDiscountType: Optional[str] = OfferDiscountType.create_raw_attr('offerDiscountType')
     """
     See offerDiscountType
+    """
+
+    eligibleWinBackOfferIds: Optional[List[str]] = attr.ib(default=None)
+    """
+    An array of win-back offer identifiers that a customer is eligible to redeem, which sorts the identifiers to present the better offers first.
+    
+    https://developer.apple.com/documentation/appstoreserverapi/eligiblewinbackofferids
     """

appstoreserverlibrary/models/OfferType.py

@@ -13,3 +13,4 @@ class OfferType(IntEnum, metaclass=AppStoreServerLibraryEnumMeta):
     INTRODUCTORY_OFFER = 1
     PROMOTIONAL_OFFER = 2
     SUBSCRIPTION_OFFER_CODE = 3
+    WIN_BACK_OFFER = 4

tests/resources/models/signedRenewalInfo.json

@@ -15,5 +15,9 @@
   "renewalDate": 1698148850000,
   "renewalPrice": 9990,
   "currency": "USD",
-  "offerDiscountType": "PAY_AS_YOU_GO"
-}
+  "offerDiscountType": "PAY_AS_YOU_GO",
+  "eligibleWinBackOfferIds": [
+    "eligible1",
+    "eligible2"
+  ]
+}

tests/test_decoded_payloads.py

@@ -111,6 +111,7 @@ def test_renewal_info_decoding(self):
         self.assertEqual("USD", renewal_info.currency)
         self.assertEqual(OfferDiscountType.PAY_AS_YOU_GO, renewal_info.offerDiscountType)
         self.assertEqual("PAY_AS_YOU_GO", renewal_info.rawOfferDiscountType)
+        self.assertEqual(['eligible1', 'eligible2'], renewal_info.eligibleWinBackOfferIds)
 
     def test_notification_decoding(self):
         signed_notification = create_signed_data_from_json('tests/resources/models/signedNotification.json')