deps: add go-simplejson dependency
deps: add go-simplejson dependency

This dependency was added in 60db45f1249f39a480b9c1d046999162901d6036.

travis-ci/worker,Acidburn0zzz/worker,Acidburn0zzz/worker,henrikhodne-abandoned/worker,henrikhodne-abandoned/worker,travis-ci/worker,travis-ci/worker,solarce/worker,solarce/worker,solarce/worker,henrikhodne-abandoned/worker,Acidburn0zzz/worker