Fix function redeclare fatal error

[SerafimArts]

Closes #113

P.S. Temporary solution that used this fix:

// composer.json
{
    // Add a repository that overrides the package's info
    "repositories": [
        {
            "type": "package",
            "package": {
                "name": "php-ds/php-ds",
                "version": "2.0.1",
                "require": {
                    "php": ">=8.2"
                },
                "autoload": {
                    "psr-4": {
                        "Ds\\": "src"
                    },
                    "files": [
                        "src/functions.php"
                    ]
                },
                "dist": {
                    "url": "https://github.com/SerafimArts/polyfill/archive/ddde872560a51cf8916c054b19e0b3f0f537ac59.zip",
                    "type": "zip"
                }
            }
        }
    ],
    // ...
    "require": {
        // ...
        "php-ds/php-ds": "^2.0.1"
    }
}