get_raw() method of the Secret Service backend works now (#87).
The file backend now works with keys that do not have a username.
All backends use the value of the
keyring_username option, if set, as the default username (#60).
keyring is now compatible with R 3.1.x and R 3.2.x.
libsecret is now optional on Linux. If not available, keyring is built without the Secret Service backend (#55).
get_raw() method on Windows.