* Fix wrong sender when send slack webhook (#7918) (#7924)
* Upload support text/plain; charset=utf8 (#7899)
* Lfs/lock: round locked_at timestamp to second (#7872) (#7875)
* Fix non existent milestone with 500 error (#7867) (#7873)
* SECURITY
* Fix No PGP signature on 1.9.1 tag (#7874)
* Release built with go 1.12.9 to fix security fixes in golang std lib, ref: https://groups.google.com/forum/#!msg/golang-announce/oeMaeUnkvVE/a49yvTLqAAAJ
* ENHANCEMENT
* Fix pull creation with empty changes (#7920) (#7926)