fix: #[no_mangle] error in Rust 2024 Edition

[martinmose]

Hey,

I know, I know - Rust 2024 just dropped, and I’m not trying to rush anything. But after upgrading to the Rust 2024 edition, I ran into the following build error:

error: unsafe attribute used without unsafe
  --> /Users/martinmose/project/target/debug/build/project_shared-0c37e55cf0c6dc4f/out/project_shared.uniffi.rs:96:3
   |
96 | #[no_mangle]
   |   ^^^^^^^^^ usage of unsafe attribute
   |
help: wrap the attribute in `unsafe(...)`
   |
96 | #[unsafe(no_mangle)]
   |   +++++++         +

I found this Unsafe Attributes

This seems like a simple fix - just wrapping #[no_mangle] in #[unsafe(...)]. But maybe there is something I’m unaware of?

It looks like it fixes my upgraded Rust project at least 😅

[bendk]

Looks like this doesn't work on older editions though, based on the CI.

Maybe we could add an #[allow] to prevent the error? If not, I guess we'd need some sort of config option where you specify which edition you're targetting.