message: Upgrades node to 16.
  node 12 doesn't compile and run correct
  resolves dependencies warning
diff: },
  "heroku-run-build-script": false,
  "engines": {
  - "node": "12.x.x",
  + "node": "16.x.x",
  "yarn": "1.x.x"
  },
  "prettier": {
  "@types/prop-types": "^15.5.2",
  "@types/react": "^17.0.14",
  "@types/react-dom": "^16.8.4",
  - "@types/react-router-dom": "^5.1.3",
  "@types/safari-extension-content": "^0.0.14",
  "@types/styled-system": "^4.1.0",
  "@types/webpack-env": "^1.13.9",
  