update font awesome react code example
Example 1: font awesome in react
$ npm i --save @fortawesome/fontawesome-svg-core @fortawesome/free-solid-svg-icons @fortawesome/react-fontawesome
Example 2: font awesome react
npm i --save @fortawesome/fontawesome-svg-core npm install --save @fortawesome/free-solid-svg-icons npm install --save @fortawesome/react-fontawesome