DUB copyFiles for subPackages

[Dmitriy]

copyFiles in subPackage finds file correct, so changing it gives 
"file not found".

Also subPackage builds into "targetPath": "/template" as expected.

But copyFiles uses "targetPath": "/build" instead of using it's 
local "targetPath": "/template".

I just assumed if targetPath has been set in subPackage then all 
commands for this package should use its targetPath config as a 
destination folder

if there somebody of dub distributors please check is it a bug?