message: Add yarn minimum version
diff: "tslint": "^5.9.1",
  "typescript": "^2.6.2"
  },
  + "engines": {
  + "yarn": ">=1.0"
  + },
  "scripts": {
  "clean": "rm -rf src/server_manager/bower_components/ src/*/node_modules/ build/ node_modules/ src/server_manager/install_scripts/do_install_script.ts",
  "do": "bash ./scripts/do_action.sh",
  