build(deps): bump uniffi from 0.29.5 to 0.31.0

[dependabot]

Bumps uniffi from 0.29.5 to 0.31.0.

Changelog

Sourced from uniffi's changelog.

v0.31.0 (backend crates: v0.31.0) - (2026-01-14)

⚠️ Breaking Changes ⚠️

• The uniffi-bindgen command no longer accepts the --lib-file argument. Instead, pass the library directly without a UDL file.
• Removed the [Swift|Kotlin|Python|Ruby]BindingGenerator types. Use uniffi::generate instead to generate these bindings.

What's Deprecated?

• BindgenCrateConfigSupplier. Use the new BindgenPaths type instead.

What's New?

• Added the uniffi::generate function. This implements the uniffi-bindgen generate command and allows it to be run programmatically.
• The --library argument of uniffi-bindgen is deprecated and no longer has an effect. uniffi-bindgen will now auto-detect when the source path is a library rather than a UDL file.
• All builtin bindings support renaming almost all of the interface (types, args, items, variants, etc) via TOML definitions - see the docs. (#2715)
• Support for methods on records and enums (#2706, #2724, #2739).
• Added the BindgenPaths type, which is the new way to find UDL and TOML data.
• Enum variants can now be renamed with the proc-macro name = "NewVariantName" attribute (#2783)
• It's now possible to build a uniffi-bindgen that doesn't depend on cargo-metadata (#2746)
• MSR is now 1.87, our CI runs against 1.90.

What's Fixed

• Kotlin: Rust enums with nested payload types are generated using the inner type’s fully qualified name, avoiding naming conflicts and allowing payloads to reuse the variant name (#2698).
• Kotlin: Enums and errors now support exporting trait methods (Display, Debug, Eq, Hash, Ord) via toString(), equals(), hashCode(), and compareTo() implementations. Flat enums only support exporting Display. (#2700).
• Kotlin: Initialization functions now have a stable ordering (#2718)
• Prevented a potential segfault when completing foreign futures (#2733)
• Swift: exporting Eq, Cmp etc would generate invalid code if the Rust name had unusual captialization (#2707).
• Fix an issue when an impl block has only async constructors (#2778)
• Fix issues parsing some #[doc(...)] attributes in exported blocks (#2777)
• Fix extracting metadata from multi-arch binary files (#2750)
• Python: improve generated code for __eq__ (#2741)

⚠️ Breaking Changes ⚠️

• Method checksums no longer include the self type. This shouldn't affect normal use. However checksum comparisons will fail if bindings built with 0.30.x and the Rust code is built with 0.31.x, or vice-versa.

⚠️ Breaking Changes for external bindings authors ⚠️

• The module_path field now stores full module paths rather than crate names only. External bindings authors will probably need to make some minor changes to work with this. See mozilla/uniffi-rs#2695 for examples.

... (truncated)

Commits

• 309762f chore: Release
• 3377882 chore: Release
• aac453d Add some missing changelog entries (#2785)
• e02e08f Improve remote custom types documentation, fixes #2745 (#2784)
• 5db1058 Fix the --crate flag (try 2) (#2781)
• 1e7795d Support renaming enum variant (#2783)
• d4594fc askama 0.13->0.14. (#2621)
• 5897c6f Honor the --crate flag (#2779)
• d7710dd Count an async constructor as an async method for an async-exported impl
• c898b2e Ignore any other doc annotation when trying to parse doc comments
• Additional commits viewable in compare view

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[github-actions]

Bencher Report

Branch	dependabot/cargo/uniffi-0.31.0
Testbed	ubuntu-latest

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Benchmark	Latency	microseconds (µs)
Create group/cs1/mem	📈 view plot ⚠️ NO THRESHOLD	317.34 µs
Join from external commit f(group size)/cs1/mem/1002	📈 view plot ⚠️ NO THRESHOLD	235,000.00 µs
Join from external commit f(group size)/cs1/mem/2	📈 view plot ⚠️ NO THRESHOLD	1,373.80 µs
Join from external commit f(group size)/cs1/mem/202	📈 view plot ⚠️ NO THRESHOLD	48,442.00 µs
Join from external commit f(group size)/cs1/mem/402	📈 view plot ⚠️ NO THRESHOLD	95,324.00 µs
Join from external commit f(group size)/cs1/mem/602	📈 view plot ⚠️ NO THRESHOLD	143,410.00 µs
Join from external commit f(group size)/cs1/mem/802	📈 view plot ⚠️ NO THRESHOLD	188,660.00 µs
Join from welcome f(group size)/cs1/mem/1002	📈 view plot ⚠️ NO THRESHOLD	105,660.00 µs
Join from welcome f(group size)/cs1/mem/2	📈 view plot ⚠️ NO THRESHOLD	883.15 µs
Join from welcome f(group size)/cs1/mem/202	📈 view plot ⚠️ NO THRESHOLD	21,871.00 µs
Join from welcome f(group size)/cs1/mem/402	📈 view plot ⚠️ NO THRESHOLD	42,816.00 µs
Join from welcome f(group size)/cs1/mem/602	📈 view plot ⚠️ NO THRESHOLD	63,974.00 µs
Join from welcome f(group size)/cs1/mem/802	📈 view plot ⚠️ NO THRESHOLD	84,512.00 µs

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