# composer require "drupal/ctools ~3.0"
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package drupal/ctools ~8.3.0-alpha21 is satisfiable by drupal/ctools[8.3.0-alpha27] but these conflict with your requirements or minimum-stability.

Installation failed, reverting ./composer.json to its original content.

{
    "name": "drupal/drupal",
    "description": "Drupal is an open source content management platform powering millions of websites and applications.",
    "type": "project",
    "license": "GPL-2.0+",
    "require": {
        "composer/installers": "^1.0.21",
        "wikimedia/composer-merge-plugin": "~1.3",
        "drupal/address": "~1.0",
        "symfony/intl": ">=1.0"
    },
    "replace": {
        "drupal/core": "~8.2",
        "drupal/entity": "8.*",
        "drupal/pathauto": "8.*",
        "drupal/simple-conreg": "8.*",
        "drupal/swiftmailer": "8.*"
    },
    "minimum-stability": "dev",
    "prefer-stable": true,
    "config": {
        "preferred-install": "dist",
        "autoloader-suffix": "Drupal8"
    },
    "extra": {
        "_readme": [
            "By default Drupal loads the autoloader from ./vendor/autoload.php.",
            "To change the autoloader you can edit ./autoload.php."
        ],
        "installer-paths": {
            "modules/contrib/{$name}": [
                "type:drupal-module"
            ],
            "modules/custom/{$name}": [
                "type:drupal-custom-module"
            ],
            "profiles/contrib/{$name}": [
                "type:drupal-profile"
            ],
            "themes/contrib/{$name}": [
                "type:drupal-theme"
            ],
            "themes/custom/{$name}": [
                "type:drupal-custom-theme"
            ],
            "libraries/{$name}": [
                "type:drupal-library"
            ],
            "drush/{$name}": [
                "type:drupal-drush"
            ]
        },
        "merge-plugin": {
            "include": [
                "core/composer.json",
                "sites/all/modules/entity/composer.json",
                "sites/all/modules/pathauto/composer.json",
                "sites/pasgonreg.lostcarpark.com/modules/simple_conreg/composer.json",
                "sites/all/modules/swiftmailer/composer.json"
            ],
            "recurse": false,
            "replace": false,
            "merge-extra": false
        }
    },
    "autoload": {
        "psr-4": {
            "Drupal\Core\Composer\": "core/lib/Drupal/Core/Composer",
            "Drupal\composer_manager\Composer\": "/var/www/drupal/sites8/all/modules/composer_manager/src/Composer"
        }
    },
    "scripts": {
        "pre-autoload-dump": "Drupal\Core\Composer\Composer::preAutoloadDump",
        "post-autoload-dump": "Drupal\Core\Composer\Composer::ensureHtaccess",
        "post-package-install": "Drupal\Core\Composer\Composer::vendorTestCodeCleanup",
        "post-package-update": "Drupal\Core\Composer\Composer::vendorTestCodeCleanup",
        "drupal-rebuild": "Drupal\composer_manager\Composer\Command::rebuild",
        "drupal-update": "Drupal\composer_manager\Composer\Command::update"
    },
    "repositories": {
        "0": {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        },
        "drupal": {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        }
    }
}