Run arbitrary package scripts
npm run-script [<pkg>] [command]
npm run [<pkg>] [command]
This runs an arbitrary command from a package's "scripts" object.
If no package name is provided, it will search for a package.json
in the current folder and use its "scripts" object. If no "command"
is provided, it will list the available top level scripts.
It is used by the test, start, restart, and stop commands, but can be called directly, as well.