update packages to latest version

node_modules/npm/doc/cli/npm-link.md

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+npm-link(1) -- Symlink a package folder
+=======================================
+
+## SYNOPSIS
+
+    npm link (in package folder)
+    npm link [@<scope>/]<pkgname>
+    npm ln (with any of the previous argument usage)
+
+## DESCRIPTION
+
+Package linking is a two-step process.
+
+First, `npm link` in a package folder will create a symlink in the global folder
+`{prefix}/lib/node_modules/<package>` that links to the package where the `npm
+link` command was executed. (see `npm-config(7)` for the value of `prefix`). It
+will also link any bins in the package to `{prefix}/bin/{name}`.
+
+Next, in some other location, `npm link package-name` will create a
+symbolic link from globally-installed `package-name` to `node_modules/`
+of the current folder.
+
+Note that `package-name` is taken from `package.json`,
+not from directory name.
+
+The package name can be optionally prefixed with a scope. See `npm-scope(7)`.
+The scope must be preceded by an @-symbol and followed by a slash.
+
+When creating tarballs for `npm publish`, the linked packages are
+"snapshotted" to their current state by resolving the symbolic links.
+
+This is handy for installing your own stuff, so that you can work on it and
+test it iteratively without having to continually rebuild.
+
+For example:
+
+    cd ~/projects/node-redis    # go into the package directory
+    npm link                    # creates global link
+    cd ~/projects/node-bloggy   # go into some other package directory.
+    npm link redis              # link-install the package
+
+Now, any changes to ~/projects/node-redis will be reflected in
+~/projects/node-bloggy/node_modules/node-redis/. Note that the link should
+be to the package name, not the directory name for that package.
+
+You may also shortcut the two steps in one.  For example, to do the
+above use-case in a shorter way:
+
+    cd ~/projects/node-bloggy  # go into the dir of your main project
+    npm link ../node-redis     # link the dir of your dependency
+
+The second line is the equivalent of doing:
+
+    (cd ../node-redis; npm link)
+    npm link node-redis
+
+That is, it first creates a global link, and then links the global
+installation target into your project's `node_modules` folder.
+
+If your linked package is scoped (see `npm-scope(7)`) your link command must
+include that scope, e.g.
+
+    npm link @myorg/privatepackage
+
+## SEE ALSO
+
+* npm-developers(7)
+* npm-faq(7)
+* package.json(5)
+* npm-install(1)
+* npm-folders(5)
+* npm-config(1)
+* npm-config(7)
+* npmrc(5)