bigquery: release bigquery/v1.11.0 (#2902)

This PR will be tagged bigquery/v1.11.0.
diff --git a/bigquery/CHANGES.md b/bigquery/CHANGES.md
index 41c797d..5c592d7 100644
--- a/bigquery/CHANGES.md
+++ b/bigquery/CHANGES.md
@@ -1,5 +1,11 @@
 # Changes
 
+## v1.11.0
+
+* Add support for optimized query path.
+* Documentation improvements.
+* Fix issue related to the ReturnType of a bigquery Routine.
+* Various updates to autogenerated clients.
 
 ## v1.10.0
 
diff --git a/internal/version/version.go b/internal/version/version.go
index 1d94ee1..c49a226 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -26,7 +26,7 @@
 
 // Repo is the current version of the client libraries in this
 // repo. It should be a date in YYYYMMDD format.
-const Repo = "20200916"
+const Repo = "20200921"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.