language: go
sudo: false
go:
  - "1.7.x"
  - "1.8.x"
  - "1.9.x"
  - "1.10.x"
  - "1.11.x"
  - "1.12.x"
  - "1.13.x"
  - "tip"

before_install:
  - go get github.com/mattn/goveralls
  - go get golang.org/x/tools/cmd/cover

script:
  - goveralls -service=travis-ci