Add param Options to getCategoryRules

[Dev-Waheed]

public function getCategoryRules($category_id, $params = [])
{
return $this->call('GET', 'categories/' . $category_id . '/rules', [
RequestOptions::QUERY => $params
]);
}

udpate this function it works fine for Uk market when switch to US market we to need to pass [category_version=>'v2'] to get category rules which the currrent code you wrote do not exactly 

[nVuln]

tks for your report, already fixed it on v2.6.1

[Dev-Waheed]

Thank you