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Introduced in branch: 

Composer is a dependency management tool for PHP which Drupal 8 has adopted it to handle its PHP dependencies, such as Symfony and Twig. You will find composer.json available at /composer.json, which follows a schema in order to define the version dependencies for each required package.


To install Composer, you can install Drush Composer using the follwing command:

drush dl composer

Alternatively, you can install Composer using straight-up PHP:

curl -s | php


Once you have Composer installed, you can update /composer.json accordingly, and run:

cd core
drush composer update

Composer will retrieve new package information and update all the dependencies.

Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other updates done