feat: GET /repos/{owner}/{repo}/actions/runs/{run_id}/approvals, {GET,POST} /repos/{owner}/{repo}/actions/runs/{run_id}/pending_deployments, GET /repos/{owner}/{repo}/environments, {GET,PUT,DELETE} /repos/{owner}/{repo}/environments/{environment_name}, GET /repositories/{repository_id}/environments/{environment_name}/secrets, GET /repositories/{repository_id}/environments/{environment_name}/secrets/public-key, {GET,PUT,DELETE} /repositories/{repository_id}/environments/{environment_name}/secrets/{secret_name} (#57)

Author: gr2m