git-utils 5.7.0 was published to the npm package registry without the necessary submodule files included

Prerequisites

[ ] Put an X between the brackets on this line if you have done all of the following:
- Reproduced the problem in Safe Mode: https://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
- Followed all applicable steps in the debugging guide: https://flight-manual.atom.io/hacking-atom/sections/debugging/
- Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
- Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
- Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

git-utils@v5.7.0 was published to the npm package registry without the submodule files included.

This occurs when running `npm publish`, after cloning this repository non-recursively (should be `git clone --recurse-submodules` (or `git clone --recurse` as a shorthand syntax)... or after cloning non-recursively, one should run `git submodule update --init`. This brings in the submodule at `deps/libgit2`. Without these files included in the published tarball, the package lacks the library it is based around, and the package does not build or function -- the package is effectively broken if uploaded without the submodule included.

Steps to Reproduce

mkdir inspect_gitutils_tarball && cd inspect_gitutils_tarball
npm pack git-utils@5.7.0 (This downloads git-utils@v5.7.0 from the npm package registry)
tar xf git-utils-5.7.0.tgz (Unpack the tarball, wait for it to finish unpacking)
ls ./package (inspect the contents of the tarball, looking for the deps/libgit2 submodule files to be present)

Expected behavior:

% ls ./package-5.6.2
LICENSE.md  appveyor.yml    deps        src
README.md   binding.gyp package.json

Submodule should be included in the tarball; there should be files in deps/libgit2

Actual behavior:

% ls ./package-5.7.0
LICENSE.md  appveyor.yml    package.json
README.md   binding.gyp src

Submodule is not included; there is no deps folder in the tarball.

Reproduces how often:

100% with v5.7.0

Versions

git-utils@v5.7.0

Additional Information

Please consider uploading a v5.7.1 with the submodule initialized. Also, consider https://github.com/atom/git-utils/pull/104 to make sure the submodule is automatically initialized before publishing this package. https://github.com/atom/git-utils/pull/104 or a similar approach would effectively prevent this issue from happening in the process of uploading future releases.

atom / git-utils