license field output not normalized

[cdaringe]

in the case where there is one license, the api returns:

licenses: 'SOMELICENSE'

in the case where there are many licenses, the api returns:

licenses: ['L1, 'L2']

it would be nice to unify the type output to always an array, or array|null

[davglass]

Sure, it does make sense to always return an Array or null.