title: How to upgrade core-js@3 in react-native cli?
body: <p>I am trying to create new project with <code>react-native</code> cli, but when I create a new project I am receiving the following error message:</p>
  
  <blockquote>
    <p>react-native > create-react-class > fbjs > core-js@1.2.7: core-js@&lt;2.6.8 is no longer maintained. Please, upgrade to core-js@3 or at least to actual version of core-js@2.</p>
  </blockquote>
  
  <p>Listed below is the contents of my <code>package.json</code> file:</p>
  
  <pre><code>{
        "name": "EmojiDictRN",
        "version": "0.0.1",
        "private": true,
        "scripts": {
          "start": "node node_modules/react-native/local-cli/cli.js start",
          "test": "jest"
        },
        "dependencies": {
          "react": "16.8.3",
          "react-native": "0.59.8"
        },
        "devDependencies": {
          "@babel/core": "^7.4.5",
          "@babel/runtime": "^7.4.5",
          "babel-jest": "^24.8.0",
          "jest": "^24.8.0",
          "metro-react-native-babel-preset": "^0.54.1",
          "react-test-renderer": "16.8.3"
        },
        "jest": {
          "preset": "react-native"
        }
      }
  </code></pre>
  
  <p>To see the full output from my terminal please click <a href="https://i.stack.imgur.com/Qt7BM.png" rel="noreferrer">here</a>. Any ideas on how to resolve this warning message? </p>
  
  <p>Any help would be greatly appreciated!</p>