Add symlink support

[bweggersen]

• nodir: true in globOptions allows glob to include symlinks in the return list, as they are treated as directories.
• Then, to not explode the .tgz file, I've set noDirRecurse: true, which means node-tar will only include the files explicitly referenced in the files list. Directories (i.e. symlinks) will then only be included as empty directories. The files list includes a complete list of all the files to be archived, so this option shouldn't create any regressions.
• Finally, I've set preservePaths: true to output symlinks correctly on tar.extract.

[dylan-smith]

@bweggersen I wanted to acknowledge that I saw your PR, but unfortunately it may be a bit before I can get to it (I want to add tests to this code base too before I add/accept new features).

[bweggersen]

I understand. Thanks for letting me know.

…

On Fri, 29 Mar 2019 at 01:48, Dylan Smith ***@***.***> wrote: @bweggersen <https://github.com/bweggersen> I wanted to acknowledge that I saw your PR, but unfortunately it may be a bit before I can get to it (I want to add tests to this code base too before I add/accept new features). — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACgzt6kYPlzLFW4GF7rNWGABPmZOl0vUks5vbWL1gaJpZM4cDPbK> .

[markjm]

@bweggersen , to confirm, this will include all files in globs specified like dir/**, but if dir/* contains a further directory, it will not recurse further than that?