fix(subscriptions): Don't publish undefined

Created by: Tirokk

Authored by roschaefer Feb 18, 2020 Merged Feb 19, 2020

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Fix #3088 (closed)

🍰 Pullrequest

Notifications not being created seems to be expected behaviour. But we never want to publish {notificationAdded: undefined}. This PR ensures this won't happen.

Issues

• fixes #3088 (closed)

This might also be a fix for our stalled builds as it avoids JavaScript runtime errors (?)