bigquery: release bigquery/v1.6.0

This PR will be tagged bigquery/v1.6.0

Change-Id: I1a1a3bb021f58f38395efb0513a94a325d4feab4
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/54590
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alex Hong <hongalex@google.com>
diff --git a/bigquery/CHANGES.md b/bigquery/CHANGES.md
index 62c6ec8..864e392 100644
--- a/bigquery/CHANGES.md
+++ b/bigquery/CHANGES.md
@@ -1,5 +1,13 @@
 # Changes
 
+## v1.6.0
+
+* Add support for materialized views.
+* Add support for policy tags (column ACLs).
+* Add bigquery/connection/v1beta1 API.
+* Documentation improvements.
+* Various updates to autogenerated clients.
+
 ## v1.5.0
 
 * Add v1 endpoint for bigquerystorage API.
diff --git a/internal/version/version.go b/internal/version/version.go
index 5e06a3e..8c279b1 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 = "20200331"
+const Repo = "20200409"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.