Upgrading & What's New in Symfony 5!

// composer.json
{
    "require": {
        "php": "^7.3.0",
        "ext-iconv": "*",
        "antishov/doctrine-extensions-bundle": "^1.4", // v1.4.2
        "aws/aws-sdk-php": "^3.87", // 3.110.11
        "doctrine/doctrine-bundle": "^2.0", // 2.0.6
        "doctrine/doctrine-migrations-bundle": "^1.3|^2.0", // 2.1.2
        "doctrine/orm": "^2.5.11", // v2.7.2
        "easycorp/easy-log-handler": "^1.0", // v1.0.9
        "http-interop/http-factory-guzzle": "^1.0", // 1.0.0
        "knplabs/knp-markdown-bundle": "^1.7", // 1.8.1
        "knplabs/knp-paginator-bundle": "^5.0", // v5.0.0
        "knplabs/knp-snappy-bundle": "^1.6", // v1.7.0
        "knplabs/knp-time-bundle": "^1.8", // v1.11.0
        "league/flysystem-aws-s3-v3": "^1.0", // 1.0.23
        "league/flysystem-cached-adapter": "^1.0", // 1.0.9
        "league/html-to-markdown": "^4.8", // 4.8.2
        "liip/imagine-bundle": "^2.1", // 2.3.0
        "nexylan/slack-bundle": "^2.1", // v2.2.1
        "oneup/flysystem-bundle": "^3.0", // 3.3.0
        "php-http/guzzle6-adapter": "^2.0", // v2.0.1
        "sensio/framework-extra-bundle": "^5.1", // v5.5.3
        "symfony/asset": "5.0.*", // v5.0.2
        "symfony/console": "5.0.*", // v5.0.2
        "symfony/dotenv": "5.0.*", // v5.0.2
        "symfony/flex": "^1.0", // v1.6.2
        "symfony/form": "5.0.*", // v5.0.2
        "symfony/framework-bundle": "5.0.*", // v5.0.2
        "symfony/mailer": "5.0.*", // v5.0.2
        "symfony/messenger": "5.0.*", // v5.0.2
        "symfony/monolog-bundle": "^3.5", // v3.5.0
        "symfony/security-bundle": "5.0.*", // v5.0.2
        "symfony/sendgrid-mailer": "5.0.*", // v5.0.2
        "symfony/serializer-pack": "^1.0", // v1.0.2
        "symfony/twig-bundle": "5.0.*", // v5.0.2
        "symfony/twig-pack": "^1.0", // v1.0.0
        "symfony/validator": "5.0.*", // v5.0.2
        "symfony/webpack-encore-bundle": "^1.4", // v1.7.2
        "symfony/yaml": "5.0.*", // v5.0.2
        "twig/cssinliner-extra": "^2.12", // v2.12.0
        "twig/extensions": "^1.5", // v1.5.4
        "twig/inky-extra": "^2.12" // v2.12.0
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.0", // 3.3.0
        "fzaninotto/faker": "^1.7", // v1.8.0
        "symfony/browser-kit": "5.0.*", // v5.0.2
        "symfony/debug-bundle": "5.0.*", // v5.0.2
        "symfony/maker-bundle": "^1.0", // v1.14.3
        "symfony/phpunit-bridge": "5.0.*", // v5.0.2
        "symfony/profiler-pack": "^1.0", // v1.0.4
        "symfony/var-dumper": "5.0.*" // v5.0.2
    }
}