Upgrade bazlets to latest stable-3.1

Change-Id: Ib683c6da06e404d22026ecc3a6468c67c40fde16

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index c6e05af..998722f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "300de940c226c4ef7f0ce4baa90e278ae0fa840c",
+    commit = "65536a2b01b0097ee3237bb48a805ed97ca51467",
     #local_path = "/home/<user>/projects/bazlets",
 )