title: Cannot find Module 'date-fns' After npm audit fix
body: <p>My react app was working fine until I ran <code>npm audit fix</code>. I am now getting an error: </p>
  
  <pre><code>Test suite failed to run
  
  Cannot find module 'date-fns/addDays' from 'date-fns-utils.js'
  
  However, Jest was able to find:
          './index.css'
          './index.js'
          './index.test.js'
  
  You might want to include a file extension in your import, or update your 'moduleFileExtensions', which is currently 
  ['web.js', 'js', 'web.ts', 'ts', 'web.tsx', 'tsx', 'json', 'web.jsx', 'jsx', 'node'].
  </code></pre>
  
  <p>On one of the tests during <code>npm test</code></p>
  
  <p>What could this be? Let me know what details I need to add. Thanks!</p>