Add artifex (#2212)
Add artifex (#2212)

- github.com repo: https://github.com/borderstech/artifex
- godoc.org: http://godoc.org/github.com/borderstech/artifex
- goreportcard.com: https://goreportcard.com/report/github.com/borderstech/artifex
- coverage service link: https://codecov.io/gh/borderstech/artifex




jmelfi/awesome-go,Oire/awesome-go,sadlil/awesome-go,theckman/awesome-go,avelino/awesome-go,pconcepcion/awesome-go