[React] Don't buffer entire stream to replace the script src

[Daniel Mizerski]

This issue is more like a note to not forget about details, I consider myself selfassigned here.

@deckchairlabs said

[...] One thing I do want to do for the react renderer, is to avoid having to buffer the entire stream to replace the script src of the bootstrap modules, or any kind of script really. Was thinking maybe lol-html could help with that

lol-html: https://github.com/cloudflare/lol-html
lol-html Deno binding: https://deno.land/x/lol_html@0.0.6
This Deno binding is quite outdated on the first glance.