chore(connectivity_plus): flutter_lints to ^4.0.0 (#2969)

Author: miquelbeltran

packages/connectivity_plus/connectivity_plus/example/pubspec.yaml

@@ -17,7 +17,7 @@ dev_dependencies:
   integration_test:
     sdk: flutter
   test: ^1.16.4
-  flutter_lints: ^3.0.1
+  flutter_lints: ^4.0.0
 
 flutter:
   uses-material-design: true

packages/connectivity_plus/connectivity_plus/pubspec.yaml

@@ -20,7 +20,7 @@ flutter:
       ios:
         pluginClass: ConnectivityPlusPlugin
         sharedDarwinSource: true
-      
+
       linux:
         dartPluginClass: ConnectivityPlusLinuxPlugin
       macos:
@@ -48,7 +48,7 @@ dev_dependencies:
     sdk: flutter
   build_runner: ^2.3.3
   dbus: ^0.7.8
-  flutter_lints: ">=2.0.2 <4.0.0"
+  flutter_lints: ^4.0.0
   mockito: ^5.4.0
   plugin_platform_interface: ^2.1.5
   test: ^1.22.0

packages/connectivity_plus/connectivity_plus_platform_interface/pubspec.yaml

@@ -17,4 +17,4 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ">=2.0.1 <4.0.0"
+  flutter_lints: ^4.0.0