Upgrade bazlets to latest stable-3.0 to build with 3.0.3 API

Change-Id: Ic83b8f9f994b3ddc8d1a5fbce1cff7b126f87bd0
diff --git a/WORKSPACE b/WORKSPACE
index 7a9f76c..5b6cd2e 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "0ca51936ca46049cddd34e971a595d3baafe731b",
+    commit = "29ba75f790c68ae2c233a67f7ce1e58e04201ce2",
     #local_path = "/home/<user>/projects/bazlets",
 )