Upgrade bazlets to latest stable-3.0 to build with 3.0.7 API

Change-Id: I693d74620c8073d96af9d3d0793bedd621eede04

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index e3e4452..db296b1 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "8ac9d00b8f12b7f61ff360c47a5bd87d7f75f4b5",
+    commit = "96f691ebbf4ef1c46b798e871ed5acd9d844651c",
     #local_path = "/home/<user>/projects/bazlets",
 )