Magento 2: Problem updating Magento v2.2.1 to v2.3.2

[Partab Saif]

i want to update my Magento to v2.3.2, when i run composer update, i get this error:

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for magento/product-community-edition 2.3.2 -> satisfiable by magento/product-community-edition[2.3.2].
    - Installation request for phpro/grumphp ^0.12.1 -> satisfiable by phpro/grumphp[v0.12.1].
    - magento/product-community-edition 2.3.2 requires symfony/console ~4.1.0 -> satisfiable by symfony/console[v4.1.0, v4.1.0-BETA1, v4.1.0-BETA2, v4.1.0-BETA3, v4.1.1, v4.1.10, v4.1.11, v4.1.12, v4.1.2, v4.1.3, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8, v4.1.9].
    - Can only install one of: symfony/console[v4.1.0, v2.8.38].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.38].
    - Can only install one of: symfony/console[v4.1.0-BETA2, v2.8.38].
    - Can only install one of: symfony/console[v4.1.0-BETA3, v2.8.38].
    - Can only install one of: symfony/console[v4.1.1, v2.8.38].
    - Can only install one of: symfony/console[v4.1.10, v2.8.38].
    - Can only install one of: symfony/console[v4.1.11, v2.8.38].
    - Can only install one of: symfony/console[v4.1.12, v2.8.38].
    - Can only install one of: symfony/console[v4.1.2, v2.8.38].
    - Can only install one of: symfony/console[v4.1.3, v2.8.38].
    - Can only install one of: symfony/console[v4.1.4, v2.8.38].
    - Can only install one of: symfony/console[v4.1.5, v2.8.38].
    - Can only install one of: symfony/console[v4.1.6, v2.8.38].
    - Can only install one of: symfony/console[v4.1.7, v2.8.38].
    - Can only install one of: symfony/console[v4.1.8, v2.8.38].
    - Can only install one of: symfony/console[v4.1.9, v2.8.38].
    - Conclusion: install symfony/console v2.8.38

 Here is my composer.json:

{
    "name": "magento/project-community-edition",
    "description": "eCommerce Platform for Growth (Community Edition)",
    "type": "project",
    "version": "2.3.2",
    "license": [
        "OSL-3.0",
        "AFL-3.0"
    ],
    "require": {
        "composer/composer": "@alpha",
        "ebizmarts/mailchimp-lib": "^3.0",
        "magento/product-community-edition": "2.3.2",
        "phpro/grumphp": "^0.12.1"
    },
    "require-dev": {
        "friendsofphp/php-cs-fixer": "~2.10.1",
        "lusitanian/oauth": "~0.8.10",
        "pdepend/pdepend": "2.5.2",
        "phpmd/phpmd": "@stable",
        "phpunit/phpunit": "~6.2.0",
        "sebastian/phpcpd": "~3.0.0",
        "squizlabs/php_codesniffer": "3.2.2"
    },
    "config": {
        "use-include-path": true,
        "preferred-install": "dist",
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "Magento\\Framework\\": "lib/internal/Magento/Framework/",
            "Magento\\Setup\\": "setup/src/Magento/Setup/",
            "Magento\\": "app/code/Magento/",
            "Zend\\Mvc\\Controller\\": "setup/src/Zend/Mvc/Controller/"
        },
        "psr-0": {
            "": "app/code/"
        },
        "files": [
            "app/etc/NonComposerComponentRegistration.php"
        ]
    },
    "autoload-dev": {
        "psr-4": {
            "Magento\\Sniffs\\": "dev/tests/static/framework/Magento/Sniffs/",
            "Magento\\Tools\\": "dev/tools/Magento/Tools/",
            "Magento\\Tools\\Sanity\\": "dev/build/publication/sanity/Magento/Tools/Sanity/",
            "Magento\\TestFramework\\Inspection\\": "dev/tests/static/framework/Magento/TestFramework/Inspection/",
            "Magento\\TestFramework\\Utility\\": "dev/tests/static/framework/Magento/TestFramework/Utility/"
        }
    },
    "minimum-stability": "alpha",
    "prefer-stable": true,
    "repositories": [
        {
            "type": "composer",
            "url": "https://repo.magento.com/"
        }
    ],
    "extra": {
        "magento-force": "override"
    }
}

[Sarvagya Pandey]

Hello @Partab Saif 

I thinkyou are skipping some step. Please refer the link https://community.magento.com/t5/Magento-2-x-Version-Upgrades/question-about-migrating-from-2-28-to-... to upgrade your magento.

Note: Please take backup of code and database before upgrade.

I hope this will works for you, if still you face any issue please let me know.

If it helps you, please give us kudos and accept it as solution.

Regards

[Sarvagya Pandey]

Hello @Partab Saif,

If my response helps you, please accept it as solution.

Thank you.

[theMageComp]

Hello

Try this method.

Download, or copy, the script file from the magento/magento2 repo
https://raw.githubusercontent.com/magento/magento2/2.3/dev/tools/UpgradeScripts/pre_composer_update_...

The upgrade script:

• Updates Magento with the 2.3 requirements.
• Backs up the composer.json file.
• Specifies the new version of the Magento metapackage.
• Updates the "require-dev" section in the composer.json file.
• Adds "Zend\\Mvc\\Controller\\": "setup/src/Zend/Mvc/Controller/" to the "autoload":"psr-4" section in the composer.json file.
• Backs up and updates the magento/updater, if it has been installed.
• Updates the "name", "version", and "description" fields in the composer.json file.

Run the script

php -f pre_composer_update_2.3.php -- --root='<path/to/magento/install/dir>' --repo=https://repo.magento.com/ <options>

Apply updates

composer update

Clear the var and generated subdirectories:

rm -rf <Magento install dir>/var/cache/*
rm -rf <Magento install dir>/var/page_cache/*
rm -rf <Magento install dir>/generated/code/*

Update the database schema and data

php bin/magento setup:upgrade

Disable maintenance mode

php bin/magento maintenance:disable