permission handler nullsafety migration

permission_handler/CHANGELOG.md

+## 6.0.0
+
+* Migrated to null safety 
+
 ## 5.1.0+2
 
 * Solve mismatch with permission constants between Dart and Android (due to addition of permission on iOS);

permission_handler/example/pubspec.yaml

@@ -15,7 +15,7 @@ dev_dependencies:
   permission_handler:
     path: ../
 
-  url_launcher: ^6.0.0-nullsafety.6
+  url_launcher: ^6.0.0
 
 flutter:
   uses-material-design: true

permission_handler/lib/permission_handler.dart

@@ -47,7 +47,7 @@ extension PermissionActions on Permission {
   /// Returns the new [PermissionStatus].
   Future<PermissionStatus> request() async {
     final permissionStatus = (await [this].request())[this];
-    return permissionStatus!;
+    return permissionStatus ??  PermissionStatus.denied;
   }
 }
 

permission_handler/pubspec.yaml

 name: permission_handler
 description: Permission plugin for Flutter. This plugin provides a cross-platform (iOS, Android) API to request and check permissions.
-version: 6.0.0-nullsafety
+version: 6.0.0
 homepage: https://github.com/baseflowit/flutter-permission-handler
 
 flutter:
@@ -16,11 +16,11 @@ dependencies:
   flutter:
     sdk: flutter
   meta: ^1.3.0
-  permission_handler_platform_interface: ^3.0.0-nullsafety
+  permission_handler_platform_interface: ^3.0.0
 
 dev_dependencies:
   effective_dart: ^1.3.0
-  plugin_platform_interface: ^1.0.3
+  plugin_platform_interface: ^2.0.0
 
 environment:
   sdk: ">=2.12.0-0 <3.0.0"