Fixed checking if a module is a node_module on Windows
Fixed checking if a module is a node_module on Windows

Ref. #189
fuse-box/fuse-box,pnml/fuse-box,fuse-box/fuse-box,pnml/fuse-box,rs3d/fuse-box,fuse-box/fuse-box,fuse-box/fuse-box,rs3d/fuse-box,pnml/fuse-box,rs3d/fuse-box