fix(create-svelte): bump minimum required Svelte version

[dummdidumm]

The Vite Svelte plugin uses the cssHash option which was added in 3.34

For some reason I can't build the templates locally, it says

import { transform } from 'sucrase';
         ^^^^^^^^^
SyntaxError: The requested module 'sucrase' is expected to be of type CommonJS, which does not support named exports. CommonJS modules can be imported by importing the default export.

So I hope I got the right place where to bump the version

[Conduitry]

What version of Node are you on when you're trying to build this locally? I think later versions got better at CJS/ESM interop in areas like this. See also the comment #1000 (comment) on that closed PR.