Warnings when updating the database

Thanks for reporting this @zenimagine.

Quote from Slack:

Those warnings can be ignored. BPMN is looking for extra attributes like colour which aren't there in previous versions.

We should avoid the warning message, though. Could you please file an issue in the bpmn_io project with the details from here? I'd be happy to avoid those warnings then.

The warnings are now avoided in the next release.

Automatically closed - issue fixed for 2 weeks with no activity.