update possible pakages

example/pubspec.lock

@@ -7,42 +7,42 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -56,7 +56,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -80,21 +80,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -106,56 +106,56 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"

lib/content/notification/notificatioin_content.dart

@@ -7,10 +7,10 @@ class NotificationContent {
   final String titleText;
 
   /// sets the notification text body
-  final String bodyText;
+  final String? bodyText;
 
   /// sets the sub text of the notification
-  final String subText;
+  final String? subText;
 
   /// the notification icon name to use.
   ///
@@ -27,7 +27,7 @@ class NotificationContent {
 
   /// the notification color
   /// if `null` the default color is used
-  final Color color;
+  final Color? color;
 
   /// the notification priority
   /// can't be `null`
@@ -36,8 +36,8 @@ class NotificationContent {
   /// used for setting the notification content
   /// for further reading click [here](https://developer.android.com/reference/androidx/core/app/NotificationCompat.Builder)
   NotificationContent({
-    @required this.titleText,
-    @required this.iconName,
+    required this.titleText,
+    required this.iconName,
     this.bodyText,
     this.subText,
     this.enableSound = false,

lib/content/notification/notification_priority.dart

@@ -7,7 +7,7 @@ enum NotificationPriority {
 }
 
 extension PriorityExtension on NotificationPriority {
-  int get priority {
+  int? get priority {
     switch (this) {
       case NotificationPriority.defaultPr:
         return 0;

lib/content/notification_channel/notification_channel_content.dart

@@ -24,8 +24,8 @@ class NotificationChannelContent {
   /// used for setting the notification content
   /// for further reading click [here](https://developer.android.com/reference/android/app/NotificationChannel)
   NotificationChannelContent({
-    @required this.id,
-    @required this.nameText,
+    required this.id,
+    required this.nameText,
     this.descriptionText = "",
     this.importance = NotificationChannelImportance.defaultIm,
     this.lockscreenVisibility = NotificationChannelLockscreenVisibility.secret,

lib/content/notification_channel/notification_channel_importance.dart

@@ -9,7 +9,7 @@ enum NotificationChannelImportance {
 }
 
 extension ImportanceExtension on NotificationChannelImportance {
-  int get importance {
+  int? get importance {
     switch (this) {
       case NotificationChannelImportance.unspecified:
         return -1000;

lib/content/notification_channel/notification_channel_lockscreen_visibility.dart

@@ -6,7 +6,7 @@ enum NotificationChannelLockscreenVisibility {
 
 extension LockscreenVisibilityExtension
     on NotificationChannelLockscreenVisibility {
-  int get visibility {
+  int? get visibility {
     switch (this) {
       case NotificationChannelLockscreenVisibility.public:
         return 1;

lib/flutter_foreground_service_plugin.dart

@@ -52,18 +52,18 @@ class FlutterForegroundServicePlugin {
   /// change a channel's name and description.`
   /// [Click here for further reading about the android notification channels](https://developer.android.com/training/notify-user/channels)
   static Future<void> startForegroundService({
-    @required NotificationContent notificationContent,
-    @required NotificationChannelContent notificationChannelContent,
+    required NotificationContent notificationContent,
+    required NotificationChannelContent notificationChannelContent,
     bool isStartOnBoot = false,
   }) async {
     assert(notificationContent != null);
     assert(notificationChannelContent != null);
     assert(isStartOnBoot != null);
 
-    int notifColorValue = notificationContent.color != null
-        ? notificationContent.color.red << 16 |
-            notificationContent.color.green << 8 |
-            notificationContent.color.blue
+    int? notifColorValue = notificationContent.color != null
+        ? notificationContent.color!.red << 16 |
+            notificationContent.color!.green << 8 |
+            notificationContent.color!.blue
         : null;
 
     Map<String, dynamic> args = {
@@ -94,14 +94,14 @@ class FlutterForegroundServicePlugin {
   }
 
   static Future<void> refreshForegroundServiceContent({
-    @required NotificationContent notificationContent,
+    required NotificationContent notificationContent,
   }) async {
     assert(notificationContent != null);
 
-    int notifColorValue = notificationContent.color != null
-        ? notificationContent.color.red << 16 |
-            notificationContent.color.green << 8 |
-            notificationContent.color.blue
+    int? notifColorValue = notificationContent.color != null
+        ? notificationContent.color!.red << 16 |
+            notificationContent.color!.green << 8 |
+            notificationContent.color!.blue
         : null;
 
     Map<String, dynamic> args = {
@@ -120,7 +120,7 @@ class FlutterForegroundServicePlugin {
 
   /// Checks wether the service is running or not
   /// if it is returns true, false otherwise
-  static Future<bool> isForegroundServiceRunning() async {
+  static Future<bool?> isForegroundServiceRunning() async {
     return await _foreground_channel.invokeMethod(_isServiceRunning);
   }
 
@@ -150,7 +150,7 @@ class FlutterForegroundServicePlugin {
   static Future<void> startPeriodicTask({
     Duration delay = const Duration(milliseconds: 0),
     Duration period = const Duration(milliseconds: 1),
-    @required void Function() periodicTaskFun,
+    required void Function() periodicTaskFun,
   }) async {
     assert(delay != null);
     assert(period != null);
@@ -159,7 +159,7 @@ class FlutterForegroundServicePlugin {
     assert(periodicTaskFun != null);
 
     var rawTaskHandler =
-        PluginUtilities.getCallbackHandle(periodicTaskFun).toRawHandle();
+        PluginUtilities.getCallbackHandle(periodicTaskFun)!.toRawHandle();
 
     Map<String, dynamic> args = {
       'taskDelay': delay.inMilliseconds,