Bump lints from 5.1.1 to 6.0.0 in the major group

Bumps the major group with 1 update: [lints](https://github.com/dart-lang/core/tree/main/pkgs).


Updates `lints` from 5.1.1 to 6.0.0
- [Release notes](https://github.com/dart-lang/core/releases)
- [Commits](https://github.com/dart-lang/core/commits/lints-v6.0.0/pkgs)

---
updated-dependencies:
- dependency-name: lints
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
...

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

Author: dependabot[bot]

pubspec.yaml

@@ -27,7 +27,7 @@ dependencies:
 dev_dependencies:
   build_runner: ^2.0.0
   dependency_validator: ">=4.0.0 <6.0.0"
-  lints: ">=2.0.0 <6.0.0"
+  lints: ">=2.0.0 <7.0.0"
   matcher: ^0.12.5
   test: ^1.15.7
   test_descriptor: ^2.0.0