`updateSubscriptions` doesn't return any callbacks

[emndeniz]

✍️ Issue Description

We are using the updateSubscriptions function in the SDK. The problem is that updateSubscriptions doesn't return any success or failure callback. In any case, update subscription endpoint returns an error, the App is unaware of it.

I was checking the implementation details and saw that in the implementation layer of the SDK, it already has the success and failure results. Can you pass these callbacks to the API level for us to get it?

Updating subscriptions is a mandatory feature for our app. Without this result we can't show a UI to user with latest enable/disable status of specific notification types.

Please provide a clear and concise description of the issue you are experiencing.

📋 Steps to Reproduce

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[joaodordio]

Thanks for this suggestion @emndeniz. Will add this to our internal discussions and then update here!