Document breaking changes in Changelog

Author: svix-mman

ChangeLog.md

@@ -1,6 +1,11 @@
 # Changelog
 
 ## Unreleased
+* Libs/Python **(Breaking)**: `PostOptions` and `ListOptions` are no longer used in methods for `Authentication`,`Endpoint`,`EventType`,`Integration`,`MessageAttempt`,`Message` and `Statistics` resources. Instead each API call now has it's own `{Resource}{Operation}Options`. (Both sync and async)
+* Libs/Python: In `Application` the `dashboard_access` method is deprecated in favor of `app_portal_access`. (Both sync and async)
+* Libs/Python **(Breaking)**: `EndpointStatsOptions` is renamed to `EndpointGetStatsOptions`
+* Libs/Python **(Breaking)**: `MessageAttemptListOptions` is removed in favor of call specific `{Resource}{Operation}Options`
+* Libs/Python **(Breaking)**: For `Statistics` in the `aggregate_event_types` method the `task_id` parameter is removed, Please note that previously this parameter was ignored and had no affect (Both sync and async)
 * Libs/Kotlin **(Breaking)**: Mark `api` field of all API resource classes as `private` (previously
   only some were private, accidentally)
 * Libs/Kotlin **(Breaking)**: Update `recover` to return `RecoverOut` (instead of nothing)