Update composer package type

[gapple]

Since Drupal Console is now installed as a project requirement instead of as a standalone application, my understanding is that the type property in composer.json should be updated.

• composer.lock is ignored if a package is installed within a project as a dependency.
• The Packagist page displays the setup command for Drupal Console as composer create-project drupal/console instead of composer require drupal/console.

[cburschka]

If composer.lock is removed, this could mean DC can safely require doctrine/collections as ^1.3 rather than 1.3.0 again, leaving it to the local composer to resolve to the versions that are compatible with the installed PHP version.

(#3365)

[jmolivas]

@gapple Thanks for your contribution, your PR was merged. This will be included on the next release.

[jmolivas]

@gapple @cburschka Should we send another PR to remove the composer.lock file to fix the doctrine/collections issue?