[device_info_platform_interface] null safety stable release (flutter#3597)

Author: Chris Yang

packages/device_info/device_info_platform_interface/CHANGELOG.md

@@ -1,16 +1,9 @@
-## 2.0.0-nullsafety.2
+## 2.0.0
 
+* Migrate to null safety.
 * Make `baseOS`, `previewSdkInt`, and `securityPatch` nullable types.
 * Remove default values for non-nullable types.
 
-## 2.0.0-nullsafety.1
-
-* Bump Dart SDK to support null safety.
-
-## 2.0.0-nullsafety
-
-* Migrate to null safety.
-
 ## 1.0.2
 
 - Update Flutter SDK constraint.

packages/device_info/device_info_platform_interface/pubspec.yaml

@@ -3,20 +3,20 @@ description: A common platform interface for the device_info plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/device_info
 # 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: 2.0.0-nullsafety.2
+version: 2.0.0
 
 dependencies:
   flutter:
     sdk: flutter
-  meta: ^1.3.0-nullsafety.3
-  plugin_platform_interface: ^1.1.0-nullsafety.1
+  meta: ^1.3.0
+  plugin_platform_interface: ">=1.0.0 <3.0.0"
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  test: ^1.10.0-nullsafety.1
-  pedantic: ^1.10.0-nullsafety.1
+  test: ^1.16.3
+  pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
   flutter: ">=1.9.1+hotfix.4"