prepare for 16.3.1 release (#2218)

flutter_local_notifications/CHANGELOG.md

@@ -1,6 +1,7 @@
-[vNext]
+# [16.3.1]
 
 * Added missing acknowledgement for readme fix in 16.3.0
+* [Android] fixed issue [2136](https://github.com/MaikuB/flutter_local_notifications/issues/2136) where notifications on scheduled using older versions of the plugin  (likely before the `androidAllowWhileIdle` flag was added) could fail to work. This issue started occuring in 14.0 where support for inexact notifications was added using the `ScheduleMode` enum that was added and resulted in the deprecation of `androidAllowWhileIdle`. A mechanism was added to help "migrate" old notifications that wouldn't have this flag so that it results in a notification scheduled with exact timing as per the old behaviour. Thanks to the PR from [Ruchi Purohit](https://github.com/RuchiPurohit). Note that this release is to include hotfix that was made as part of the 14.1.5 and 15.1.3 hotfix releases
 
 # [16.3.0]
 
@@ -35,6 +36,10 @@
 * Fixed Dart API docs for `DarwinNotificationDetails` class where `this This` was being repeated. Thanks to the PR from [Adrian Jagielak](https://github.com/adrianjagielak)
 * Fixed example code shown at the "Handling notifications whilst the app is in the foreground" section of the readme. Thanks to the PR from [Tinh Huynh](https://github.com/TinhHuynh)
 
+# [15.1.3]
+
+* [Android] fixed issue [2136](https://github.com/MaikuB/flutter_local_notifications/issues/2136) where notifications on scheduled using older versions of the plugin  (likely before the `androidAllowWhileIdle` flag was added) could fail to work. This issue started occuring in 14.0 where support for inexact notifications was added using the `ScheduleMode` enum that was added and resulted in the deprecation of `androidAllowWhileIdle`. A mechanism was added to help "migrate" old notifications that wouldn't have this flag so that it results in a notification scheduled with exact timing as per the old behaviour. Thanks to the PR from [Ruchi Purohit](https://github.com/RuchiPurohit). Note that this release is to include hotfix that was made as part of the 14.1.5 hotfix release
+
 # [15.1.2]
 
 * [Android] fixed issue [2106](https://github.com/MaikuB/flutter_local_notifications/issues/2106) where calling `getNotificationChannels()` reports the wrong importance level or result in an exception if the importance level was unspecified. This hotfix has been taken from the 16.0.0-dev.3 prerelease and included in the 14.1.4 hotfix release
@@ -66,6 +71,10 @@
 * Updated API documentation related to the iOS/macOS notification presentation options to include links to Apple's documentations to show what they correspond to
 * Fixed typo in API docs for `initialize()` method
 
+# [14.1.5]
+
+* [Android] fixed issue [2136](https://github.com/MaikuB/flutter_local_notifications/issues/2136) where notifications on scheduled using older versions of the plugin  (likely before the `androidAllowWhileIdle` flag was added) could fail to work. This issue started occuring in 14.0 where support for inexact notifications was added using the `ScheduleMode` enum that was added and resulted in the deprecation of `androidAllowWhileIdle`. A mechanism was added to help "migrate" old notifications that wouldn't have this flag so that it results in a notification scheduled with exact timing as per the old behaviour. Thanks to the PR from [Ruchi Purohit](https://github.com/RuchiPurohit)
+
 # [14.1.4]
 
 * [Android] fixed issue [2106](https://github.com/MaikuB/flutter_local_notifications/issues/2106) where calling `getNotificationChannels()` reports the wrong importance level or result in an exception if the importance level was unspecified. This hotfix has been taken from the 16.0.0-dev.3 prerelease

flutter_local_notifications/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_local_notifications
 description: A cross platform plugin for displaying and scheduling local
   notifications for Flutter applications with the ability to customise for each
   platform.
-version: 16.3.0
+version: 16.3.1
 homepage: https://github.com/MaikuB/flutter_local_notifications/tree/master/flutter_local_notifications
 issue_tracker: https://github.com/MaikuB/flutter_local_notifications/issues