Upgrade bazlets to latest master

Adapt SNAPSHOT plugin api example to the master version.

Change-Id: I0e47004012a1e1d55aa3f2663ab0bbe9a370faba

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 3671e11..e755949 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "5c26af9e0374ede4cd67939be972adf6c4cda791",
+    commit = "4293943826c5c1a42d39d772008106e4e02836cd",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
@@ -16,4 +16,4 @@
 gerrit_api()
 
 # Load snapshot Plugin API
-#gerrit_api(version = "3.1.xy-SNAPSHOT")
+#gerrit_api(version = "3.3.0-SNAPSHOT")