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. As with all commands that install
packages, the --dev flag will cause devDependencies to be processed
as well.
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.