adding jsonnet-deps to release

[jordan-da]

This should add jsonnet-deps to the release artifacts so that it is included in the release bundles in github:

https://github.com/google/go-jsonnet/releases

This is my first time using goreleaser so my apologies if I did something silly here.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[jordan-da]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

This should be fixed now

[coveralls]

Coverage: 68.303%. Remained the same when pulling 1e3b299 on jordan-da:master into a39e181 on google:master.

[sbarzowski]

Thank you! See: https://github.com/google/go-jsonnet/releases/tag/v0.19.2-pre2