Nix 0.30.0 TODO

[SteveLauC]

Milestone: https://github.com/nix-rust/nix/milestone/17

In Nix 0.30.0, most interfaces should have I/O safety adopted, so there are a lot of braking changes included. We should help Nix users migrate to 0.30.0.

For those popular crates, we should probably test the usability before releasing Nix 0.30.0 in case something unexpected happens.

ref: #1750

[Berrysoft]

May I ask what's the progress of 0.30? It seems that all PRs listed in #1750 has been merged.

[SteveLauC]

Yeah, let's roll for a new release

#2624 (comment)