update dependencies version
- "react": "^16.4.0",
- "react-dom": "^16.4.0",
- "autoprefixer": "^8.5.1",
- "eslint-plugin-import": "^2.12.0",
- "eslint-plugin-react": "^7.8.2",
- "react-hot-loader": "^4.2.0",
- "sass-loader": "^7.0.1",
- "style-loader": "^0.21.0",
- "webpack": "^4.10.1",
- "webpack-cli": "^2.1.4",