chore(bigquery): release bigquery/v1.12.0 (#3003)

This PR will be tagged bigquery/v1.12.0
diff --git a/bigquery/CHANGES.md b/bigquery/CHANGES.md
index 114960f..1f6b972 100644
--- a/bigquery/CHANGES.md
+++ b/bigquery/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## v1.12.0
+
+* Adds additional retry support for table deletion.
+* Various updates to autogenerated clients.
+
 ## v1.11.2
 
 * Addresses issue with consuming query results using an iterator.Pager
diff --git a/internal/version/version.go b/internal/version/version.go
index 06a7806..d75ed10 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 = "20201002"
+const Repo = "20201012"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.