Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Upgrade bazlets to latest stable-2.16 to build with 2.16.13 API

Change-Id: I3d6233c20dbf1c17a913d80df274c128f59e01c1
diff --git a/WORKSPACE b/WORKSPACE
index 42fe032..a0f0b2e 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "23d849dfd1876c1b4b88efa55a4f716895e33fa3",
+    commit = "ca31f016a3130c3eeb032538d2832bf555559b28",
     #local_path = "/home/<user>/projects/bazlets",
 )