message: add unique id helper polyfill to deps
  so that consumers don't need to install it
diff: "file-loader": "^6.2.0",
  "macro-decorators": "^0.1.2",
  "qunit": "^2.14.0",
  - "walk-sync": "^2.2.0"
  + "walk-sync": "^2.2.0",
  + "ember-unique-id-helper-polyfill": "^0.1.0"
  },
  "devDependencies": {
  "@actions/core": "^1.2.6",
  "ember-template-lint": "^3.2.0",
  "ember-toolbars": "^0.6.0",
  "ember-try": "^1.4.0",
  - "ember-unique-id-helper-polyfill": "^0.1.0",
  "eslint": "^7.20.0",
  "eslint-config-prettier": "^7.1.0",
  "eslint-plugin-ember": "^10.1.1",
  