title: Both reCaptcha v2 and v3 on same page
body: <p>as I understand, it seems to be possible to use both v2 and v3 on the same page (see <a href="https://github.com/google/recaptcha/issues/279" rel="noreferrer">https://github.com/google/recaptcha/issues/279</a>), but can't find any example of it :/</p>
  
  <p>I already have HTML pages with invisible v2, and first, I want to evaluate the accuracy of the v3 score without breaking my current v2 (v3 will be only for test purposes). I was also wondering if it could be possible to use v3 and render v2 challenges for low scores.</p>
  
  <p>Any idea ?</p>
  
  <p>(sorry for my english, it's not my mother tongue ;)</p>