Invalid field role_id type in INTEGRATION_UPDATE

[Azn9]

Description

I recently started seeing errors in my bot, related to Guild Integrations.
The field role_id is marked as possible and not nullable, but I receive events with it present and null, breaking the deserialization of the payload.

Steps to Reproduce

Just start a bot and wait for an integration update.

Expected Behavior

Either the doc should specify that the field may be null, or the api should not include it when it is.

Current Behavior

I receive payloads with the role_id field being null:

{"t":"INTEGRATION_UPDATE","s":592,"op":0,"d":{"type":"twitch","syncing":false,"synced_at":"2020-06-03T22:14:35.881000+00:00","subscriber_count":0,"role_id":null,"revoked":true,"name":"<redacted>","id":"<redacted>","expire_grace_period":7,"expire_behavior":0,"enabled":true,"enable_emoticons":true,"account":{"name":"<redacted>","id":"<redacted>"},"guild_id":"<redacted>"}}

Screenshots/Videos

No response

Client and System Information

Discord4J 3.3.0-SNAPSHOT