Upgrade bazlets to latest stable-2.16 to build with 2.16.2 API

Change-Id: I0d6b75ecd18c29a4bf0758536adf7f136e14e89c
diff --git a/WORKSPACE b/WORKSPACE
index 788db88..36bc7d1 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "d025e909c2e8a369712165309f599a2765005f2d",
+    commit = "587749a13fcd3c6970a5418ea4496febabb50cdb",
     #local_path = "/home/<user>/projects/bazlets",
 )