Bump uniffi from 0.27.3 to 0.29.4

Bumps [uniffi](https://github.com/mozilla/uniffi-rs) from 0.27.3 to 0.29.4.
- [Changelog](https://github.com/mozilla/uniffi-rs/blob/main/CHANGELOG.md)
- [Commits](mozilla/uniffi-rs@v0.27.3...v0.29.4)

---
updated-dependencies:
- dependency-name: uniffi
  dependency-version: 0.29.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -26,7 +26,7 @@ path = "src/bin.rs"
 [dependencies]
 feather-ui.workspace = true
 feather-macro.workspace = true
-uniffi = "0.27.0"
+uniffi = "0.29.4"
 
 [build-dependencies]
-uniffi = { version = "0.27.0", features = ["build"] }
+uniffi = { version = "0.29.4", features = ["build"] }