Replace `Pleroma.FlakeId` with `flake_id` hex package
As per discussion in #pleroma-dev.
Before removing "WIP" we need:
- Please, review egor/flake_id!1
- Merge egor/flake_id!1
- Move egor/flake_id to pleroma/flake_id
- Publish
flake_id
- Update
flake_id
dependency in mix.exs in this MR
Edited by minibikini