chore(deps): update dependency lints to v6 (#3)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pubspec.yaml

@@ -17,5 +17,5 @@ dependencies:
   http_parser: ^4.1.1
 
 dev_dependencies:
-  lints: ^5.0.0
+  lints: 6.1.0
   test: ^1.24.0