Prepare to publish analyzer_plugin 0.9.0

Change-Id: I9e13e48818fc2907f27168eeb120fe821fce0470
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/225660
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/pkg/analyzer_plugin/CHANGELOG.md b/pkg/analyzer_plugin/CHANGELOG.md
index 04ab329..ca17b41 100644
--- a/pkg/analyzer_plugin/CHANGELOG.md
+++ b/pkg/analyzer_plugin/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 0.9.0
+- Support version `3.x` of the `analyzer` package
+
 ## 0.8.0
 - Require SDK `2.14` to use `Object.hash()`.
 - Require `yaml 3.1.0` to use `recover`.
diff --git a/pkg/analyzer_plugin/pubspec.yaml b/pkg/analyzer_plugin/pubspec.yaml
index 41b859d..c8b99c8 100644
--- a/pkg/analyzer_plugin/pubspec.yaml
+++ b/pkg/analyzer_plugin/pubspec.yaml
@@ -1,15 +1,15 @@
 name: analyzer_plugin
 description: A framework and support code for building plugins for the analysis server.
-version: 0.8.0
+version: 0.9.0
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/analyzer_plugin
 
 environment:
   sdk: '>=2.14.0 <3.0.0'
 
 dependencies:
-  analyzer: ^2.4.0
+  analyzer: ^3.0.0
   collection: ^1.15.0
-  dart_style: ^2.0.0
+  dart_style: ^2.2.1
   pub_semver: ^2.0.0
   yaml: ^3.1.0