public function getHighestVersion(array $versions = []): string
    {
        $highest_version = 0;
        foreach ($versions as $version_number) {
            if ($version_number === 'dev-master') {
                continue;
            }
            if (str_replace('.', '', $version_number)+0 > $highest_version) {
                $highest_version = $version_number;
            }
        }
        if ($highest_version == 0) {
            return 'dev-master';
        }

        return $highest_version;
    }