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## Summary
Update [schemars
0.9.0](https://github.com/GREsau/schemars/releases/tag/v0.9.0)
There are differences in the generated JSON Schema and I will [contact
the author](https://github.com/GREsau/schemars/issues/407).
## Test Plan
---------
Co-authored-by: konstin <konstin@mailbox.org>
## Summary
Closes#13253
## Test Plan
```sh
❯ cat pyproject.toml | rg required
required-version = ">=0.7.3, <0.8"
❯ cargo run -q --features self-update --manifest-path ~/uv/Cargo.toml add black
error: Required uv version `>=0.7.3, <0.8` does not match the running version `0.7.2`.
hint: Update `uv` by running `uv self update`.
❯ cat pyproject.toml | rg required
required-version = ">=0.7.3"
❯ cargo run -q --features self-update --manifest-path ~/uv/Cargo.toml add black
error: Required uv version `>=0.7.3` does not match the running version `0.7.2`.
hint: Update `uv` by running `uv self update`.
❯ cat pyproject.toml | rg required
required-version = "<0.7"
❯ cargo run -q --features self-update --manifest-path ~/uv/Cargo.toml add black
error: Required uv version `<0.7` does not match the running version `0.7.2`.
❯ cat pyproject.toml | rg required
required-version = ">=0.4,<0.7"
❯ cargo run -q --features self-update --manifest-path ~/uv/Cargo.toml add black
error: Required uv version `>=0.4, <0.7` does not match the running version `0.7.2`.
```
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
Three edition 2021 compatible sets of changes in preparation for the
edition 2025 split out from #11724.
In edition 2025, `gen` is a keyword, so we escape it as `r#gen`. `ref`
and `ref mut` are not allowed anymore for `&T` and `&mut T`, so we
remove them. `cargo fmt` now formats inside of macros, which the 2021
formatter doesn't undo.
## Summary
This is the pattern I see in a variety of crates, and I believe this is
preferred if you don't _need_ an owned `String`, since you can avoid the
allocation. This could be pretty impactful for us?
## Summary
This follows Ruff's design exactly: you can provide a version specifier
(like `>=0.5`), and we'll enforce it at runtime.
Closes https://github.com/astral-sh/uv/issues/8605.