Upgrade bazlets to latest stable-2.16 to build with 2.16.23 API

Change-Id: Iad94962affaeb9219f9cb4e6d9f41ab240628d03

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 922467e..add9251 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "8ad33887665f4f6adf7cb465a03f6bd81b95e01d",
+    commit = "7be854b98543c6429dd5038ff38846a1230b4dbe",
     #local_path = "/home/<user>/projects/bazlets",
 )