Where to add a new repository?

composer.json

{
    "name": "sroutier/laravel-5.1-enterprise-starter-kit",
    "description": "A Starter project based on Laravel 5.1 with theme support, optional LDAP/AD authentication, dynamic route authorization, etc...",
    "keywords": [
      "framework",
      "laravel",
      "starter kit",
      "template",
      "theme",
      "LDAP",
      "Active Directory"
    ],
    "homepage": "https://github.com/sroutier/laravel-5.1-enterprise-starter-kit",
    "license": "GPLv3",
    "authors": [
      {
        "name": "Sebastien Routier",
        "email": "[email protected]"
      }
    ],
    "type": "project",
    "repositories": [
      {
        "type": "vcs",
        "url": "https://github.com/sroutier/laravel-5.1-enterprise-starter-kit",
        "url": "https://github.com/sam452/teamwork"
      }
    ],
    "require": {
        "php": ">=5.5.9",
        "laravel/framework": "5.1.*",
        "doctrine/dbal": "^2.6@dev",
        "laravelcollective/html": "~5.0",
        "yaap/theme": "dev-laravel-5.1",
        "barryvdh/laravel-ide-helper": "^2.0@dev",
        "barryvdh/laravel-debugbar": "^2.0@dev",
        "laracasts/flash": "~1.3",
        "zizaco/entrust": "dev-laravel-5",
        "bosnadev/repositories": "0.*",
        "sroutier/eloquent-ldap": "^1.0@dev",
        "zofe/rapyd": "2.1.*",
        "baum/baum": "~1.1",
        "huddledigital/zendesk-laravel": "~2.0",
        "sam452/teamwork": "^1.0.0@dev"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~4.0",
        "phpspec/phpspec": "~2.1",
        "jeroen-g/laravel-packager": "dev-master",
        "libern/laravel-sql-logging": "^1.0@dev"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan ide-helper:generate",
            "php artisan optimize"
        ],
        "post-root-package-install": [
            "php -r \"copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    },
    "minimum-stability": "dev",
    "prefer-stable": true
}

package.json

{
  "private": true,
  "devDependencies": {
    "gulp": "~3.9.0",
    "laravel-elixir": "^1.0.0",
  }
}