React Chat app dependencies

package.json

{
  "name": "RC-Chat",
  "dependencies": {
    "@material-ui/core": "^3.9.3",
    "@material-ui/icons": "^3.0.2",
    "@types/react": "^16.8.14",
    "@types/react-dom": "^16.8.4",
    "dotenv": "^8.0.0",
    "isomorphic-ws": "^4.0.1",
    "jsdoc": "^3.5.5",
    "node-sass": "^4.12.0",
    "prop-types": "^15.7.2",
    "react": "^16.8.6",
    "react-dom": "^16.8.6",
    "react-router-dom": "^5.0.0",
    "react-scripts": "3.0.0",
    "ws": "^6.2.1"
  },
  ....
  "devDependencies": {
    "@types/enzyme": "^3.9.1",
    "@types/jest": "^24.0.11",
    "@types/node": "^11.13.7",
    "@types/react-router-dom": "^4.3.2",
    "@types/ws": "^6.0.1",
    "awesome-typescript-loader": "^5.2.1",
    "enzyme": "^3.9.0",
    "enzyme-adapter-react-16": "^1.12.1",
    "react-test-renderer": "^16.8.6",
    "source-map-loader": "^0.2.4",
    "typescript": "^3.4.5"
  }
}