message: Downgrade tslint first as the current one doesn't support no-used-var rule
diff: "gulp-inject-string": "^1.1.0",
  "gulp-shell": "^0.5.2",
  "gulp-tag-version": "^1.3.0",
  - "gulp-tslint": "^8.0.0",
  + "gulp-tslint": "^7.0.1",
  "gulp-typings": "^2.0.0",
  "merge-stream": "^1.0.0",
  "mocha": "^3.2.0",
  - "tslint": "^5.1.0",
  + "tslint": "^4.3.1",
  "typescript": "^2.3.2",
  "vscode": "^1.0.5"
  }
  