public function version($version = null)
    {
        if (!$version) {
            $versionParts = explode('.', \Peridot\Console\Version::NUMBER);
            $versionParts[count($versionParts)-1]++;
            $version = implode('.', $versionParts);
        }
        $versionFile = __DIR__ . '/src/Console/Version.php';
        $this->taskReplaceInFile($versionFile)
            ->from('NUMBER = "' . \Peridot\Console\Version::NUMBER . '"')
            ->to('NUMBER = "' . $version . '"')
            ->run();

        return $version;
    }