composer.json

{
    "name": "distributedproofreaders/dproofreaders",
    "description": "Distributed Proofreaders is a web application intended to ease the process of converting public domain books into e-texts.",
    "type": "project",
    "license": "GPL-2.0-or-later",
    "minimum-stability": "stable",
    "require": {
        "ezyang/htmlpurifier" : "v4.*",
        "erusev/parsedown": "1.8.0-beta-7",
        "erusev/parsedown-extra": "0.8.0",
        "voku/portable-utf8": "^6.0",
        "phpmailer/phpmailer": "^6.8"
    },
    "require-dev": {
        "friendsofphp/php-cs-fixer": "^3.0",
        "phpunit/phpunit": "^9.5.0"
    },
    "replace": {
        "symfony/polyfill-php54": "*",
        "symfony/polyfill-php55": "*",
        "symfony/polyfill-php56": "*",
        "symfony/polyfill-php70": "*",
        "symfony/polyfill-php72": "*",
        "symfony/polyfill-php74": "*",
        "symfony/polyfill-mbstring": "*",
        "symfony/polyfill-intl-grapheme": "*",
        "symfony/polyfill-intl-normalizer": "*"
    }
}