npm/npm — pull request #5605 by isaacs (2014-07-02 17:13:15+00:00)
Title: Three short grables

Three tiny fixes for review.

The first makes `--versions` handle `--json`, the better to script it with.

The second suppresses headings from `outdated` if there's nothing to report. (Rule of silence.)

The third defaults to `latest` rather than `*` for unspecified packages, addressing #5600