Dart: Bump mojo_sdk version

Review URL: https://codereview.chromium.org/1874503002 .
diff --git a/mojo/dart/packages/mojo_sdk/CHANGELOG.md b/mojo/dart/packages/mojo_sdk/CHANGELOG.md
index d2570c7..48a5ffa 100644
--- a/mojo/dart/packages/mojo_sdk/CHANGELOG.md
+++ b/mojo/dart/packages/mojo_sdk/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.2.23
+
+  - 39 changes: https://github.com/domokit/mojo/compare/ccedda3...2f662f4
+
+  MOJO_SDK: 2f662f419ff3328ee1d1a1a47e2a0056b80a2086
+
 ## 0.2.22
 
   - 21 changes: https://github.com/domokit/mojo/compare/5bb113e...d3a630f
diff --git a/mojo/dart/packages/mojo_sdk/pubspec.yaml b/mojo/dart/packages/mojo_sdk/pubspec.yaml
index d12abdd..9b65455 100644
--- a/mojo/dart/packages/mojo_sdk/pubspec.yaml
+++ b/mojo/dart/packages/mojo_sdk/pubspec.yaml
@@ -1,8 +1,8 @@
 author: Chromium Authors <mojo-dev@googlegroups.com>
 dependencies:
-  mojo: 0.4.18
-  mojo_services: 0.4.25
+  mojo: 0.4.19
+  mojo_services: 0.4.26
 description: A meta package for the Dart Mojo SDK
 homepage: https://github.com/domokit/mojo
 name: mojo_sdk
-version: 0.2.22
+version: 0.2.23