Update a package
npm update [-g] [<name> [<name> ...]]
This command will update all the packages listed to the latest version (specified by the tag config).
It will also install missing packages.
If the -g flag is specified, this command will update globally installed packages. If no package name is specified, all packages in the specified location (global or local) will be updated.
npm help install
npm help outdated
npm help registry
npm help folders
npm help ls