GET /repos/{owner}/{repo}/issues/{issue_number}/labels
POST /repos/{owner}/{repo}/issues/{issue_number}/labels
PUT /repos/{owner}/{repo}/issues/{issue_number}/labels
DELETE /repos/{owner}/{repo}/issues/{issue_number}/labels
DELETE /repos/{owner}/{repo}/issues/{issue_number}/labels/{name}
GET /repos/{owner}/{repo}/labels
POST /repos/{owner}/{repo}/labels
GET /repos/{owner}/{repo}/labels/{name}
PATCH /repos/{owner}/{repo}/labels/{name}
DELETE /repos/{owner}/{repo}/labels/{name}
GET /repos/{owner}/{repo}/milestones/{milestone_number}/labels
GET /search/labels