Add required status checks contexts of protected branch

Protected branches are available in public repositories with GitHub Free and GitHub Free for organizations, and in public and private repositories with GitHub Pro, GitHub Team, GitHub Enterprise Cloud, and GitHub Enterprise Server. For more information, see GitHub's products in the GitHub Help documentation. 

POST /repos/:owner/:repo/branches/:branch/protection/required_status_checks/contexts

Example

[
  "continuous-integration/jenkins"
]

Response

Status: 200 OK

[
  "continuous-integration/travis-ci",
  "continuous-integration/jenkins"
]