Preparing webdev for 4.0.0 release (#2846)

webdev/CHANGELOG.md

diff --git a/webdev/CHANGELOG.md b/webdev/CHANGELOG.md
index 6354054..46c3c2a 100644
--- a/webdev/CHANGELOG.md
+++ b/webdev/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 4.0.0-wip
+## 4.0.0
 
 - Add `module-format` flag for testing new DDC Library Bundle module format prior to release.
 - Fix webdev failing to compile in aot mode due to missing DDS arguments.

webdev/lib/src/version.dart

diff --git a/webdev/lib/src/version.dart b/webdev/lib/src/version.dart
index 85487ec..66803ec 100644
--- a/webdev/lib/src/version.dart
+++ b/webdev/lib/src/version.dart
@@ -1,2 +1,2 @@
 // Generated code. Do not modify.
-const packageVersion = '4.0.0-wip';
+const packageVersion = '4.0.0';

webdev/pubspec.yaml

diff --git a/webdev/pubspec.yaml b/webdev/pubspec.yaml
index a473256..36d5510 100644
--- a/webdev/pubspec.yaml
+++ b/webdev/pubspec.yaml
@@ -1,6 +1,6 @@
 name: webdev
 # Every time this changes you need to run `dart run build_runner build`.
-version: 4.0.0-wip
+version: 4.0.0
 # We should not depend on a dev SDK before publishing.
 # publish_to: none
 description: >-