Pin vue-demi and vue-composition-api dependencies to last working version

[sduduzog]

Most likely an issue with [email protected] but it seems to break the composition api and thus, provide/inject will not work properly,(not sure what other features) and within nuxt, you get the error attached below, and an error screen when in dev mode on you browser

This is a familiar error for vue-demi as it has happened before and a fix for it was updating the composition-api dependency and setting a minimum required one...

I also took the opportunity to expose one more type that I hope people will find usefull:
There's no need to install @supabase/supabase-js along side these packages now as they pretty much bring all you need. i.e. Here's a quick example of what I mean

import { Session, useSupabase } from "vue-supabase" // no need to import Session from @supabase/supabase-js anymore
const session = ref<Session>();
setup() {
  const supabase = useSupabase();
  supabase.auth.onAuthStateChange((_, _session) => {
    session.value = _session;
  });
}