Bump flutter_lints from 3.0.2 to 4.0.0 in /widgets/cupertino

Bumps [flutter_lints](https://github.com/flutter/packages/tree/main/packages) from 3.0.2 to 4.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/flutter_lints-v4.0.0/packages)

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

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

widgets/cupertino/pubspec.yaml

@@ -28,5 +28,5 @@ dependencies:
   cupertino_icons: ^1.0.6
   page_view_dot_indicator: ^2.3.0
 dev_dependencies: 
-  flutter_lints: ^3.0.1
+  flutter_lints: ">=3.0.1 <5.0.0"
 flutter: