The main .wasm bundle is 1) cached 2) not cache-busted

Sorry for the short bug report, but essentially when using dx serve and iterating, I keep having to open the dev tools and disable caching. Otherwise, when I reload the page, it reverts back to the old version of the bundle. Hot patching actually changes things, but reloading reverts them back to use the cached version of the bundle.

That's a pretty bad bug as far as I'm concerned, but I think cache busting is an easy way to solve it!