Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Upgrade bazlets to latest stable-2.16 to build with 2.16.20 API

Change-Id: I14f10ea6d8ce805513d10885b53e698f0f032287

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 483f3a8..07f3ec7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "15eae2ee5cd524a204bd62c3d59bfd0ce86916ec",
+    commit = "51c1fd2758fcc1b900a80d4ebb037bc373f85d39",
     #local_path = "/home/<user>/projects/bazlets",
 )