Upgrade bazlets to latest revision

Change-Id: Ib8eb4b4b8368a86a7faf5a5a80e31623a1520b8e
diff --git a/WORKSPACE b/WORKSPACE
index dac3097..5fec9c3 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,6 +3,6 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "42244973783cd0b14c5dc24014a97c4148488d6a",
+    commit = "13330934a0e577d60719551ffb746f64b0bb9637",
     #    local_path = "/home/<user>/projects/bazlets"
 )