Cannot install as per documentation

[mathuin]

README.md provides a command for installation. When I run it on Ubuntu 16.04 LTS, it does not work.

$ go get -u github.com/google/shenzhen-go/cmd/shenzhen-go
# github.com/google/shenzhen-go/graph
go/src/github.com/google/shenzhen-go/graph/graph.go:114: enc.SetIndent undefined (type *json.Encoder has no field or method SetIndent)
$ uname -a
Linux nala 4.4.0-59-generic #80-Ubuntu SMP Fri Jan 6 17:47:47 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/issue
Ubuntu 16.04.1 LTS \n \l

$ go version
go version go1.6.2 linux/amd64

Please let me know if there's anything else I can do to help diagnose the issue. This looks super fun!

[dmitshur]

From the error message, I can tell the problem is that shenzhen-go requires Go 1.7+, but you have 1.6. SetIndent is a method that was added to encoding/json.Encoder in 1.7.