language: go

go:
  - 1.5
  - 1.6
  - 1.7
  - 1.8
  - 1.9
  - tip

language: go

go:
  - 1.8
  - 1.9
  - tip

Fix Travis-Ci build fail: remove Go version before 1.8
Fix Travis-Ci build fail: remove Go version before 1.8

After Go 1.8, we can call Server.Shutdown().
