[image_picker_platform_interface] Bump NNBD version to stable (#3573)

diff --git a/packages/image_picker/image_picker_platform_interface/CHANGELOG.md b/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
index fc953e4..f2e017e 100644
--- a/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
+++ b/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.0.0-nullsafety
+## 2.0.0
 
 * Migrate to null safety.
 * Breaking Changes:
diff --git a/packages/image_picker/image_picker_platform_interface/pubspec.yaml b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
index d5f5ce9..9befba9 100644
--- a/packages/image_picker/image_picker_platform_interface/pubspec.yaml
+++ b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
@@ -3,20 +3,20 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker_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: 2.0.0-nullsafety
+version: 2.0.0
 
 dependencies:
   flutter:
     sdk: flutter
-  meta: ^1.3.0-nullsafety.6
-  http: ^0.13.0-nullsafety.0
-  plugin_platform_interface: ^1.1.0-nullsafety.2
+  meta: ^1.3.0
+  http: ^0.13.0
+  plugin_platform_interface: ">=1.0.0 <3.0.0"
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  pedantic: ^1.10.0-nullsafety.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: ">=1.10.0"