Set to publish new analyzer_plugin.

Currently latest published version depends on <0.33.0 which is causing problems
for built value: https://github.com/google/built_value.dart/issues/518

Change-Id: Id5bf8e755132613cd56a631b433115efff64b120
Reviewed-on: https://dart-review.googlesource.com/c/80560
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Mike Fairhurst <mfairhurst@google.com>
diff --git a/pkg/analyzer_plugin/pubspec.yaml b/pkg/analyzer_plugin/pubspec.yaml
index 1241d29..a174edc 100644
--- a/pkg/analyzer_plugin/pubspec.yaml
+++ b/pkg/analyzer_plugin/pubspec.yaml
@@ -1,6 +1,6 @@
 name: analyzer_plugin
 description: A framework for building plugins for the analysis server.
-version: 0.0.1-alpha.4
+version: 0.0.1-alpha.5
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/analyzer_plugin