singleDocData should be implicit

[paultranvan]

When querying a single doc, one can pass a singleDocData options so the result.data returned by the query will be an object containing the doc, rather than an array of size 1.
When it's not done, a warning is emitted:

cozy-client/packages/cozy-client/src/hooks/useQuery.js

Line 51 in 60a1ec5

logger.warn('useQuery options.singleDocData will pass to true in a next version of cozy-client, please add it now to prevent any problem in the future.')

saying that a future cozy-client version will implicitly set this attribute, and thus making a breaking change.
While this has been added in a while, this warning remains. We should fulfill this promise eventually.