bigquery: release bigquery/v1.8.0

This PR will be tagged bigquery/v1.8.0

Change-Id: I3ff32202395a9cad099f4acfd272f7abd39d937a
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/56612
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
diff --git a/bigquery/CHANGES.md b/bigquery/CHANGES.md
index c9a2280..34d43c8 100644
--- a/bigquery/CHANGES.md
+++ b/bigquery/CHANGES.md
@@ -1,6 +1,11 @@
 # Changes
 
 
+## v1.8.0
+
+* Add support for hourly time partitioning.
+* Various updates to autogenerated clients.
+
 ## v1.7.0
 
 * Add support for extracting BQML models to cloud storage.
diff --git a/internal/version/version.go b/internal/version/version.go
index fc71573..3227ea3 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 = "20200512"
+const Repo = "20200519"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.