Bump lints from 5.1.1 to 6.0.0 (#422)

Bumps [lints](https://github.com/dart-lang/core/tree/main/pkgs) 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
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pubspec.yaml

@@ -19,7 +19,7 @@ dev_dependencies:
   collection: ^1.15.0
   dependency_validator: ">=3.0.0 <6.0.0"
   json_serializable: ^6.6.1
-  lints: ^5.0.0
+  lints: ">=5.0.0 <7.0.0"
   nock: ^1.1.3
   pub_semver: ^2.0.0
   test: ^1.21.6