{
    "require": {
        "mailgun/mailgun-php": "^4.3",
        "php-http/guzzle6-adapter": "^2.0",
        "http-interop/http-factory-guzzle": "^1.2",
        "phpmailer/phpmailer": "^6.10"
    },
    "config": {
        "allow-plugins": {
            "php-http/discovery": true
        }
    }
}