Restart a package
npm.commands.restart(packages, callback)
This restarts a package (or multiple packages).
This runs a package's "stop", "restart", and "start" scripts, and associated pre- and post- scripts, in the order given below:
If no version is specified, then it restarts the "active" version.
npm can restart multiple packages. Just specify multiple packages in
the packages parameter.
Note that the "restart" script is run in addition to the "stop" and "start" scripts, not instead of them.
This is the behavior as of npm major version 2. A change in this
behavior will be accompanied by an increase in major version number