Error executing composer update when trying to install scafold package in Laravel 5.1

I'm trying to install the scafold package in Laravel 5.1 but when I run the composer update it shows me an error.

  

C: \ xampp \ htdocs \ sites \ inventory> composer update Loading composer   repositories with package information Updating dependencies (including   require-dev)

     

[ErrorException] zlib_decode (): data error

     

update [--prefer-source] [--prefer-dist] [--dry-run] [--dev]   [--no-dev] [--lock] [--no-plu gins] [--no-custom-installers]   [--no-autoloader] [--no-scripts] [--no-progress] [--with-de   pendencies] [-v | vv | vvv | --verbose] [-o | --optimize-autoloader]   [--ignore-platform-reqs] [--p refer-stable] [--prefer-lowest]   [packages1] ... [packagesN]

Then I ran the composer -vvv update command:

  

Downloading    link $ 4721af190d059e42de5d516c963b992ca7e16   55071f2f84cfaf1fc7fcfa54b8e.json

     

[ErrorException] zlib_decode (): data error

     

Exception trace: () at   phar: // C: /ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Util/RemoteFi   les ystem.php: 218

I think it's an error in Laravel ... I have already updated the composer, I already checked if composer.phar is without utf8 - good and also if PHP zlib is enabled.

composer.json:

{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
    "php": ">=5.5.9",
    "laravel/framework": "5.1.*",
    "bestmomo/scafold": "0.0.1"
},
"require-dev": {
    "fzaninotto/faker": "~1.4",
    "mockery/mockery": "0.9.*",
    "phpunit/phpunit": "~4.0",
    "phpspec/phpspec": "~2.1"
},
"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "estoque\": "app/"
    }
},
"autoload-dev": {
    "classmap": [
        "tests/TestCase.php"
    ]
},
"scripts": {
    "post-install-cmd": [
        "php artisan clear-compiled",
        "php artisan optimize"
    ],
    "pre-update-cmd": [
        "php artisan clear-compiled"
    ],
    "post-update-cmd": [
        "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"
}
}