error[E0599]: no method named and_utc found for struct NaiveDateTime in the current scope

[brianmay]

Bug Description

Compiler error

Steps to Reproduce

1. Upgrade pyo3 from 0.19.2 to 0.20.0
2. Compile

Backtrace

error[E0599]: no method named `and_utc` found for struct `NaiveDateTime` in the current scope
   --> /home/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/pyo3-0.20.0/src/conversions/chrono.rs:230:15
    |
230 |         Ok(dt.and_utc())
    |               ^^^^^^^ method not found in `NaiveDateTime`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `pyo3` (lib) due to previous error

### Your operating system and version

Linux

### Your Python version (`python --version`)

N/A

### Your Rust version (`rustc --version`)

Rust 1.73

### Your PyO3 version

0.20.0

### How did you install python? Did you use a virtualenv?

N/A

### Additional Info

https://github.com/brianmay/robotica-rust/actions/runs/6506697314/job/17672737275?pr=277

[brianmay]

I think my chrono was out of date. 0.4.24.

Wondering if it is possible to increase the minimum version this library. But I don't really understand dependency management that well.

Anyway, closing.

[adamreichold]

I think there is a real bug here, because while we properly constrain our dev-dependency on chrono via

chrono = { version = "0.4.25" }

our optional runtime dependency is incorrect

chrono = { version = "0.4", default-features = false, optional = true }

should also use 0.4.25 as the version specifier.