Yarn deduplicate CLI

Bundled package of yarn-deduplicate CLI with some patches;
To clean up yarn.lock by removing duplicates.
Patches
- Bundle
yarn-deduplicate CLI with webpack and babel for Node 6 compatibility
- Now we can guess duplicatable packages with
--scopes option special values: '^', '~', and '*'
Usage
Guess duplicatable packages with:
yarn-deduplicate -l --scopes "^" path/to/yarn.lock
This will list all duplicatable packages then we can deduplicate them manually.
License
Apache 2.0 licensed, see LICENSE.txt file.