In memory databases seems not to be supported.

[Pablo De Nápoli]

I'm trying to create a client for a database in memory with the following code:

import { createClient } from '@libsql/client';

const client = createClient({
	url: ':memory:'
});

I get the following code

LibsqlError: URL_INVALID: The URL is not in a valid format

This feature would be useful for instance, when writing tests.

[Pablo De Nápoli]

Many thanks, this is very useful for me! I'm submitting a pull-request for adding this to the documentation in the README

#136