title: Attempted import error: 'unstable_useId' is not exported from '@material-ui/core/utils' (imported as 'useId')
body: <p>I've just spent 3h trying to find a solution by myself, but I'm defintely stuck.</p>
  
  <p>I'd like to use the Mui Autocomplete component, but whatever I try I get this message:</p>
  
  <pre><code>Failed to compile
  
  ./node_modules/@material-ui/lab/esm/useAutocomplete/useAutocomplete.js
  Attempted import error: 'unstable_useId' is not exported from '@material-ui/core/utils' (imported as 'useId').
  </code></pre>
  
  <p>I already checked that my core and lab were up to date, but they are:</p>
  
  <pre><code>"@material-ui/core": "^4.9.11",
  "@material-ui/lab": "^4.0.0-alpha.50",
  </code></pre>
  
  <p>And the weirdest is that it works like a charm on CodeSandBox with the very same setup...</p>
  
  <p>No idea if this is a clue or not, but I noticed that, in the folder <code>utils</code>, almost every single file with a <code>.js</code> extension has its "clone" with <code>.d.ts</code> extension. Actually, in this folder, my <code>unstable_useId.js</code> doesn't have its <code>.d.ts</code> one, so... Might it be the problem?</p>
  
  <p>Thanks a lot ! I hope I've been clear enough :)</p>