Assume absolute paths for `goto`
Assume absolute paths for `goto`

A recent change in import-js core [1] made it so that all paths returned
by `goto` are absolute. We no longer need to join it with the project
folder.

[1] https://github.com/Galooshi/import-js/commit/dcd41b242845b59927b4c2227ece4aa5ad134fc1

Galooshi/sublime-import-js