README: changes for v0.12.0

Will tag the repo immediately after this is submitted.

Change-Id: I486ecd4496b9d4e1783ba2eed08b7159a14df282
Reviewed-on: https://code-review.googlesource.com/16070
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ross Light <light@google.com>
diff --git a/README.md b/README.md
index cf4b009..937a528 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,28 @@
 
 ## News
 
+_August 22, 2017+
+
+*v0.12.0*
+
+- pubsub: Subscription.Receive now uses streaming pull.
+
+- pubsub: add Client.TopicInProject to access topics in a different project
+  than the client.
+
+- errors: renamed errorreporting. The errors package will be removed shortly.
+
+- datastore: improved retry behavior.
+
+- bigquery: support updates to dataset metadata, with etags.
+
+- bigquery: add etag support to Table.Update (BREAKING: etag argument added).
+
+- bigquery: generate all job IDs on the client.
+
+- storage: support bucket lifecycle configurations.
+
+
 _July 31, 2017_
 
 *v0.11.0*