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* Reflects the changes made to gpgme-json in commit
6cc842c9aa.
- getKeysArmored now returns an object with property 'armored' being
the exported armored block, and an (optional) array of fingerprint
strings for those keys that can be used in sign/encrypt operations
as property 'secret_fprs'. With this, extensions such as mailvelope
will be able to bulk fetch all necessary key information in one
request.