v0.0.7: Migration to Supabase Backend

LeanCloud is sunsetting (see announcement here), new users of the nexment library are encouraged to use Supabase as their database + auth backend.

We have provied a Leancloud → Supabase migration guide at https://github.com/ttttonyhe/nexment#migrating-from-leancloud.

Full Changelog: https://github.com/ttttonyhe/nexment/commits/0.0.7