Support latest supabase js v2 (and fix useRealtime & useSubscription)

[tonyxiao]

useSubscription and useRealtime are completely broken right now because the signature for subscription has changed in v2. See https://supabase.com/docs/reference/javascript/subscribe

[Danieltech99]

Adding a note: I believe useSignIn is also broken.
Breaking changes: https://supabase.com/blog/supabase-js-v2#new-auth-methods