Bump gerrit API to 3.4.0-SNAPSHOT

Change-Id: I64c74998d12d16ab4069f84bed933e4c6f928da9

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index f269e80..d17aa23 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -16,7 +16,7 @@
 #gerrit_api()
 
 # Load snapshot Plugin API
-gerrit_api(version = "3.3.0-SNAPSHOT")
+gerrit_api(version = "3.4.0-SNAPSHOT")
 
 load("//:external_plugin_deps.bzl", "external_plugin_deps")