Issues, Projects and namespaces methods

• listPipelines(int $project_id, $additionalParams = [])
• createIssue(int $project_id, string $title, string $body, $assignee_ids = [], \DateTime $due_date = NULL, array $labels = [])
• listIssues(int $project_id, string $state = NULL, int $assignee_id = NULL, $additionalParams = [])
• showIssue(int $project_id, int $issue_iid)
• listNamespaces()
• listProjects(bool $simple = TRUE, $includeArchived = FALSE, $additionalParams = [])
• showProject($project_id)