How to mutate Arrays of Objects with vue-apollo

LocalesType.php

<?php
namespace App\GraphQL\Types\System\Localization;

// Locale Model
use App\System\Localization\Locale;

use GraphQL\Type\Definition\Type;
use Rebing\GraphQL\Support\Type as GraphQLType;

class LocalesType extends GraphQLType
{
    protected $attributes = [
        'name' => 'Locales',
        'description' => 'A type of locale',
        'model' => Locale::class,
    ];

    public function fields()
    {
        return [
            'id' => [
                'type' => Type::nonNull(Type::int()),
                'description' => 'The id of the project'
            ],

            'identifier' => [
                'type' => Type::string(),
                'description' => 'The identifier of the locale'
            ],

            'description' => [
                'type' => Type::string(),
                'description' => 'The description of the locale'
            ]
        ];
    }
}