Release v2.3.0
MRs:
- Improve gitaly info refs error message !172 (merged)
- Migrate GetBlob to Gitaly !174 (merged)
- Drop support for Go <1.8 !176 (merged)
- Add some tests for gzipped assets !177 (merged)
- Use reader/writer from gitaly streamio !178 (merged)
- Use http.Request contexts for Gitaly calls !179 (merged)
- Allow to access remote archive !180 (merged)