Imports
- github.com/Masterminds/semver
- github.com/cavaliercoder/grab
- github.com/google/go-github/github
- github.com/gregjones/httpcache
- github.com/gregjones/httpcache/diskcache
- github.com/hashicorp/go-checkpoint
- github.com/spf13/viper
- golang.org/x/oauth2