[webview_flutter] release null safety to stable(#3619)

diff --git a/packages/webview_flutter/CHANGELOG.md b/packages/webview_flutter/CHANGELOG.md
index 0a060ef..fb448d2 100644
--- a/packages/webview_flutter/CHANGELOG.md
+++ b/packages/webview_flutter/CHANGELOG.md
@@ -1,30 +1,12 @@
-## 2.0.0-nullsafety.6
-
-* Added support for progress tracking.
-
-## 2.0.0-nullsafety.5
-
-* Add section to the wiki explaining how to use Material components.
-
-## 2.0.0-nullsafety.4
-
-* Update integration test to workaround an iOS 14 issue with `evaluateJavascript`.
-
-## 2.0.0-nullsafety.3
-
-* Fix `onWebResourceError` on iOS.
-
-## 2.0.0-nullsafety.2
-
-* Fix outdated links across a number of markdown files ([#3276](https://github.com/flutter/plugins/pull/3276))
-
-## 2.0.0-nullsafety.1
-
-* Added `allowsInlineMediaPlayback` property.
-
-## 2.0.0-nullsafety
+## 2.0.0
 
 * Migration to null-safety.
+* Added support for progress tracking.
+* Add section to the wiki explaining how to use Material components.
+* Update integration test to workaround an iOS 14 issue with `evaluateJavascript`.
+* Fix `onWebResourceError` on iOS.
+* Fix outdated links across a number of markdown files ([#3276](https://github.com/flutter/plugins/pull/3276))
+* Added `allowsInlineMediaPlayback` property.
 
 ## 1.0.8
 
diff --git a/packages/webview_flutter/example/pubspec.yaml b/packages/webview_flutter/example/pubspec.yaml
index b61b6df..d7688b7 100644
--- a/packages/webview_flutter/example/pubspec.yaml
+++ b/packages/webview_flutter/example/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Demonstrates how to use the webview_flutter plugin.
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
 
 dependencies:
   flutter:
@@ -22,7 +22,7 @@
     sdk: flutter
   integration_test:
     path: ../../integration_test
-  pedantic: ^1.8.0
+  pedantic: ^1.10.0
 
 flutter:
   uses-material-design: true
diff --git a/packages/webview_flutter/pubspec.yaml b/packages/webview_flutter/pubspec.yaml
index 5d8e512..bae19fd 100644
--- a/packages/webview_flutter/pubspec.yaml
+++ b/packages/webview_flutter/pubspec.yaml
@@ -1,10 +1,10 @@
 name: webview_flutter
 description: A Flutter plugin that provides a WebView widget on Android and iOS.
-version: 2.0.0-nullsafety.5
 homepage: https://github.com/flutter/plugins/tree/master/packages/webview_flutter
+version: 2.0.0
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
   flutter: ">=1.22.0"
 
 dependencies:
@@ -16,7 +16,7 @@
     sdk: flutter
   flutter_driver:
     sdk: flutter
-  pedantic: ^1.10.0-nullsafety.1
+  pedantic: ^1.10.0
 
 flutter:
   plugin: