Upgrade bazlets to latest stable-3.0 to build with 3.0.8 API

Change-Id: I79c9acda4757f3e94726724114a417d53dba99ea

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 380ccf8..9b5b278 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "4909dd878ded009edc140319246a2e0681763743",
+    commit = "97eef86854b0fb68b9287831f3075b6f6218ff41",
     #local_path = "/home/<user>/projects/bazlets",
 )