chore(deps): bump ffigen in /packages/nekoton_bridge

Bumps [ffigen](https://github.com/dart-lang/native/tree/main/pkgs) from 8.0.2 to 16.0.0.
- [Release notes](https://github.com/dart-lang/native/releases)
- [Commits](https://github.com/dart-lang/native/commits/HEAD/pkgs)

---
updated-dependencies:
- dependency-name: ffigen
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

packages/nekoton_bridge/pubspec.yaml

@@ -8,7 +8,7 @@ environment:
   sdk: '>=3.0.0 <4.0.0'
 
 dev_dependencies:
-  ffigen: ^8.0.2
+  ffigen: ">=8.0.2 <17.0.0"
   lints: ^4.0.0
   test: ^1.25.8
   freezed: ^2.5.7