Chore(deps): Bump ffigen from 11.0.0 to 12.0.0

Bumps [ffigen](https://github.com/dart-lang/native/tree/main/pkgs) from 11.0.0 to 12.0.0.
- [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>

Author: dependabot[bot]

pubspec.yaml

@@ -20,7 +20,7 @@ dependencies:
   plugin_platform_interface: '>=2.0.2 <3.0.0'
 
 dev_dependencies:
-  ffigen: ">=10.0.0 <12.0.0"
+  ffigen: ">=10.0.0 <13.0.0"
   flutter_test:
     sdk: flutter
   flutter_lints: ">=2.0.0 <4.0.0"