Changelog from gitaly:

** v1.7.0

**** Added
- Add an RPC that allows repository size to be reduced by bulk-removing internal references
  gitaly!990

** v1.6.0

**** Other
- Clean up invalid keep-around refs when performing housekeeping
  gitaly!992

** v1.5.0

**** Added
- Add tls configuration to gitaly golang server
  gitaly!932

**** Fixed
- Fix TLS client code on macOS
  gitaly!994

**** Other
- Update to latest goimports formatting
  gitaly!993

** v1.4.0

**** Added
- Link and Unlink RPCs
  gitaly!986

** v1.3.0

*** Other
- Remove unused bridge_exceptions method
  gitaly!987
- Clean up process documentation
  gitaly!984