Customizing the ReactJS sample application created using react-cli
 Some time you may want to create the react.js application using react-cli and you may also want to customize it according to your requirements.   react-cli command always get the latest version of all the libraries. for instance if you look at the package.json file then you will see the following contents:   package.json  ========================================================================   {   "name": "testapp",   "version": "0.1.0",   "private": true,   "dependencies": {     "react": "^15.6.1",     "react-dom": "^15.6.1"   },   "devDependencies": {     "react-scripts": "1.0.10"   },   "scripts": {     "start": "react-scripts start",     "build": "react-scripts build",     "test": "react-scripts test --env=jsdom",     "eject": "react-scripts eject"   } }  =======...