chore(datastore): release datastore/v1.3.0 (#2872)

diff --git a/datastore/CHANGES.md b/datastore/CHANGES.md
index 9043a76..61b9812 100644
--- a/datastore/CHANGES.md
+++ b/datastore/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## v1.3.0
+- Fix saving behavior for non-struct custom types which implement
+  `PropertyLoadSaver` and for nil interface types.
+- Support `DetectProjectID` when using the emulator.
+
 ## v1.2.0
 - Adds Datastore Admin API.
 - Documentation updates.
diff --git a/internal/version/version.go b/internal/version/version.go
index 3774b76..1d94ee1 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 = "20200911"
+const Repo = "20200916"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.