setup: bump Celery version

[jmartinm]

No description provided.

[jacquerie]

You'll want to make this generate a major version, otherwise you're going to break the build!

[jacquerie]

As for this build not passing, see: inveniosoftware/troubleshooting#8.

[jmartinm]

As for this build not passing, see: inveniosoftware/troubleshooting#8.

Let's see if it works now, although even applying the changes in inveniosoftware/invenio-indexer@e044428 I am getting the error locally.

You'll want to make this generate a major version, otherwise you're going to break the build!

@david-caro is there a way to mark it in the commit message?

[david-caro]

Yes, you can even do it from the ui on github when you hit the merge button, you can add to it (at the end):

My message

Sem-Ver: breaking change

That will tag it as major change.

[jmartinm]

Depends on celery/vine#18

[jmartinm]

The issue with Celery was fixed in celery/celery#4399. Once a new release of Celery 4 is done, this can unblocked.