Can't manage reject/errors on the queue

[florianperrot44]

If we throw errors on the queue, it seems to fall in the dark... that is not compliant with the last Electron version for example.
Why not return the Promise created by the add function ?
return new Promise((resolve, reject) in line 40
Ok, it breaks the chaining add().add().add() but how to do that otherwise ?
Thanks for the job