Just use an “index.html” template file which grabs the latest version: 
<!DOCTYPE html>
<meta charset=utf-8>
<meta name=viewport content=width=device-width,initial-scale=1>
<script defer src=https://Unpkg.com/p5></script>
<!--<script defer src=https://Unpkg.com/p5/lib/addons/p5.dom.min.js></script>-->
<!--<script defer src=https://Unpkg.com/p5/lib/addons/p5.sound.min.js></script>-->
<script defer src=sketch.js></script>