Laravel 5.5.45 to 5.6

it seems i can't update my laravel installation from 5.5.54 to 5.6.

php artisan -V -> Laravel Framework 5.5.45 then composer update:

Loading composer repositories with package information

Updating dependencies (including require-dev)

Nothing to install or update

Package phpunit/phpunit-mock-objects is abandoned, you should avoid using it. No replacement was suggested.

Generating optimized autoload files Illuminate\Foundation\ComposerScripts::postAutoloadDump @php artisan package:discover

Discovered Package: barryvdh/laravel-ide-helper Discovered Package: fideloper/proxy Discovered Package: laravel/tinker Discovered Package: nesbot/carbon

Package manifest generated successfully.

then php artisan -V but again i have Laravel Framework 5.5.45.

My composer.json:

{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
    "php": ">=7.1.3",
    "fideloper/proxy": "^4.0",
    "doctrine/dbal": "^2.5",
    "intervention/image": "^2.3",
    "laravel/framework": "5.6.*",
    "laravelcollective/html": "^5.3",
    "spatie/laravel-permission": "^2.2",
    "laravel-tinker": "~1.0",
    "filp/whoops": "~2.0"
},
"require-dev": {
    "fzaninotto/faker": "~1.4",
    "filp/whoops": "~2.0",
    "barryvdh/laravel-ide-helper": "^2.1",
    "mockery/mockery": "~1.0",
    "phpunit/phpunit": "^7.0"
},
"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
    }
},
"autoload-dev": {
    "psr-4": {
        "Tests\\": "tests/"
    }
},
"scripts": {
    "post-root-package-install": [
        "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
    ],
    "post-create-project-cmd": [
        "php artisan key:generate"
    ],
    "post-install-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postInstall",
        "php artisan optimize"
    ],
    "post-update-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postUpdate",
        "php artisan optimize"
    ],
    "post-autoload-dump": [
        "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
        "@php artisan package:discover"
    ]
},
"config": {
    "preferred-install": "dist",
    "sort-packages": true,
    "optimize-autoloader": true
}

}

Thank for you help. Emanuele

via Chebli Mohamed