message: Lock typescript version to fix compile error
diff: "mocha": "*",
  "ts-node": "^8.1.0",
  "tslib": "^1.10.0",
  - "typescript": "^3.4.4"
  + "typescript": "3.5.3"
  },
  "homepage": "https://github.com/azure/azure-rest-api-specs",
  "repository": {
  