Working composer.json for Drupal stackexchange question 230267

composer.json

{
    "name": "drupal-composer/drupal-project",
    "description": "Project template for Drupal 8 projects with composer",
    "type": "project",
    "license": "GPL-2.0+",
    "authors": [
        {
            "name": "",
            "role": ""
        }
    ],
    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        }
    ],
    "require": {
        "composer/installers": "^1.2",
        "drupal-composer/drupal-scaffold": "^2.2",
        "cweagans/composer-patches": "~1.0",
        "drupal/core": "8.3.0-rc1",
        "drush/drush": "~8.0",
        "drupal/console": "~1.0",
        "drupal/pathauto": "^1.0@RC",
        "drupal/coffee": "^1.0@beta",
        "drupal/redirect": "^1.0@alpha",
        "drupal/prepopulate": "^2.0@alpha",
        "drupal/addanother": "^1.0@RC",
        "drupal/seo_checklist": "^4.0",
        "drupal/checklistapi": "^1.4",
        "drupal/unique_field_ajax": "^1.0",
        "drupal/git_deploy": "2.x",
        "drupal/tagclouds": "1.x"
    },
    "require-dev": {
        "behat/mink": "~1.7",
        "behat/mink-goutte-driver": "~1.2",
        "jcalderonzumba/gastonjs": "~1.0.2",
        "jcalderonzumba/mink-phantomjs-driver": "~0.3.1",
        "mikey179/vfsStream": "~1.2",
        "phpunit/phpunit": "~4.8",
        "symfony/css-selector": "~2.8"
    },
    "conflict": {
        "drupal/drupal": "*"
    },
    "minimum-stability": "dev",
    "prefer-stable": true,
    "autoload": {
        "classmap": [
            "scripts/composer/ScriptHandler.php"
        ]
    },
    "scripts": {
        "drupal-scaffold": "DrupalComposer\\DrupalScaffold\\Plugin::scaffold",
        "pre-install-cmd": [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "pre-update-cmd": [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "post-install-cmd": [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ],
        "post-update-cmd": [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ]
    },
    "extra": {
        "installer-paths": {
            "web/core": ["type:drupal-core"],
            "web/libraries/{$name}": ["type:drupal-library"],
            "web/modules/contrib/{$name}": ["type:drupal-module"],
            "web/profiles/contrib/{$name}": ["type:drupal-profile"],
            "web/themes/contrib/{$name}": ["type:drupal-theme"],
            "drush/contrib/{$name}": ["type:drupal-drush"]
        }
    }
}