🛠 add `npmInstall: true` back for `subgrunt:init`
🛠 add `npmInstall: true` back for `subgrunt:init`

no issue
- fixes `grunt init` task when client submodules aren't already installed

letsjustfixit/Ghost,bitjson/Ghost,singular78/Ghost,janvt/Ghost,acburdine/Ghost,e10/Ghost,JohnONolan/Ghost,cwonrails/Ghost,ErisDS/Ghost,leninhasda/Ghost,singular78/Ghost,vainglori0us/urban-fortnight,vainglori0us/urban-fortnight,sebgie/Ghost,cwonrails/Ghost,sebgie/Ghost,BlueHatbRit/Ghost,mohanambati/Ghost,novaugust/Ghost,Kikobeats/Ghost,vainglori0us/urban-fortnight,dbalders/Ghost,JohnONolan/Ghost,kevinansfield/Ghost,kevinansfield/Ghost,chevex/undoctrinate,BlueHatbRit/Ghost,ErisDS/Ghost,stridespace/Ghost,TryGhost/Ghost,bitjson/Ghost,sebgie/Ghost,Gargol/Ghost,stridespace/Ghost,letsjustfixit/Ghost,dbalders/Ghost,JohnONolan/Ghost,Kikobeats/Ghost,Gargol/Ghost,e10/Ghost,cwonrails/Ghost,stridespace/Ghost,singular78/Ghost,ErisDS/Ghost,acburdine/Ghost,TryGhost/Ghost,dbalders/Ghost,kevinansfield/Ghost,janvt/Ghost,TryGhost/Ghost,novaugust/Ghost,leninhasda/Ghost,letsjustfixit/Ghost,Kikobeats/Ghost,mohanambati/Ghost,novaugust/Ghost,acburdine/Ghost,mohanambati/Ghost