Upgrade bazlets to latest stable-3.0 to build with 3.0.1 API

Change-Id: I83d94c7ebfcf00af09088ce1f1451b71f57b3ac2
diff --git a/WORKSPACE b/WORKSPACE
index 694e70e..18ce67d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "51049da0140c58ee26f8285bca4393c5e43ce4a1",
+    commit = "f4a0de709185c5447fed6fdce124dc5d33065ca1",
     #local_path = "/home/<user>/projects/bazlets",
 )