message: Releasing 0.4.4
diff: Changelog
  =========
  -0.4.4 (2019-??-??)
  +0.4.4 (2019-03-27)
  ------------------
  * An expired refresh token should return `invalid_grant` and not
  `invalid_request.`
  +* Default refresh token lifetime is now set to 6 hours.
  0.4.3 (2019-03-18)
  