Nodejs: Fast, disk space efficient package manager: pnpm

### Features:

- Fast. As fast as npm and Yarn.

- Efficient. One version of a package is saved only ever once on a disk.

- Deterministic. Has a lockfile called shrinkwrap.yaml.

- Strict. A package can access only dependencies that are specified in its package.json.

- Works everywhere. Works on Windows, Linux and OS X.

- Aliases. Install different versions of the same package or import it using a different name.

Edit: formatting