fix(pkg): properly output in workspace mode

[wraithgar]

~/D/n/c/b/main (gar/pkg-get-workspaces|✔) $ npm pkg get name -w libnpmexec
"libnpmexec"
{
  "libnpmexec": "libnpmexec"
}
~/D/n/c/b/main (gar/pkg-get-workspaces|✔) $ node . pkg get name -w libnpmexec
{
  "libnpmexec": "libnpmexec"
}