DEPRECATED: 'license' defined in snapcraft.yaml

[Joseph Rushton Wakeling]

Just got the above error message as I was finishing up my LDC snap.

What's the recommended way to include license information?  I ask because the 
'snapcraft syntax' page on snapcraft.io lists the `licence` attribute without 
any mention of deprecation or an alternative for it:
http://snapcraft.io/docs/build-snaps/syntax

Apologies if the question has been asked and answered before, but I didn't find 
anything obvious in the mailing list archives, so I thought I would ask the 
question very obviously in order to correct that ;-)

Thanks & best wishes,

      -- Joe