Upgrade to latest bazlets

Change-Id: If380c360733a916442415674acf88d61df235add
diff --git a/WORKSPACE b/WORKSPACE
index 91147b7..6532df5 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "b7514d03a7798905ff1513295b46620e57b8f386",
+    commit = "42bffc66c0e92753133e4cea2debe65abc359c4d",
     #    local_path = "/home/<user>/projects/bazlets",
 )