build(deps): Bump lints from 4.0.0 to 5.1.1

Bumps [lints](https://github.com/dart-lang/core/tree/main/pkgs) from 4.0.0 to 5.1.1.
- [Release notes](https://github.com/dart-lang/core/releases)
- [Commits](https://github.com/dart-lang/core/commits/lints-v5.1.1/pkgs)

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

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

pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
   convert: ^3.1.1
 
 dev_dependencies:
-  lints: '>=3.0.0 <5.0.0'
+  lints: ">=3.0.0 <6.0.0"
   http: '>=1.0.0 <2.0.0'
   test: ^1.24.2
   test_descriptor: ^2.0.1