env GITHUB_API_TOKEN=... github-required-context-manager -owner aereal -repo github-required-context-manager -branch master -list
env GITHUB_API_TOKEN=... github-required-context-manager -owner aereal -repo github-required-context-manager -branch master -add -context merge-blocker
env GITHUB_API_TOKEN=... github-required-context-manager -owner aereal -repo github-required-context-manager -branch master -delete -context merge-blocker