[video_player_platform_interface] messages.dart use 2.12
diff --git a/packages/video_player/video_player_platform_interface/CHANGELOG.md b/packages/video_player/video_player_platform_interface/CHANGELOG.md
index 748998f..446fffd 100644
--- a/packages/video_player/video_player_platform_interface/CHANGELOG.md
+++ b/packages/video_player/video_player_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.0-nullsafety.3
+
+* `messages.dart` sets Dart `2.12`.
+
 ## 3.0.0-nullsafety.2
 
 * Bump Dart SDK to support null safety.
diff --git a/packages/video_player/video_player_platform_interface/pubspec.yaml b/packages/video_player/video_player_platform_interface/pubspec.yaml
index de35d59..ea8d317 100644
--- a/packages/video_player/video_player_platform_interface/pubspec.yaml
+++ b/packages/video_player/video_player_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 3.0.0-nullsafety.2
+version: 3.0.0-nullsafety.3
 
 dependencies:
   flutter: