Added a v4 alias to canary in the api module.
Added a v4 alias to canary in the api module.

issue https://github.com/TryGhost/Team/issues/221

bitjson/Ghost,ErisDS/Ghost,janvt/Ghost,TryGhost/Ghost,bitjson/Ghost,TryGhost/Ghost,ErisDS/Ghost,janvt/Ghost,e10/Ghost,TryGhost/Ghost,ErisDS/Ghost,e10/Ghost