Bump analyzer from 5.13.0 to 6.3.0 in /kiwi_generator

Bumps [analyzer](https://github.com/dart-lang/sdk/tree/main/pkg) from 5.13.0 to 6.3.0.
- [Changelog](https://github.com/dart-lang/sdk/blob/main/CHANGELOG.md)
- [Commits](https://github.com/dart-lang/sdk/commits/HEAD/pkg)

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

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

kiwi_generator/pubspec.yaml

@@ -7,7 +7,7 @@ environment:
   sdk: '>=2.14.0 <4.0.0'
 
 dependencies:
-  analyzer: ^5.4.0
+  analyzer: ">=5.4.0 <7.0.0"
   build: ^2.3.1
   build_config: ^1.1.1
   code_builder: ^4.4.0