Update VERSION and XOS parent container

Change-Id: I7466d8b3b73a9559d5d4cb2202396b15c3e785f6
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 743a3c5..2fef9bb 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -15,7 +15,7 @@
 # docker build -t xosproject/kubernetes-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/kubernetes-synchronizer
-FROM xosproject/xos-synchronizer-base:2.1.5
+FROM xosproject/xos-synchronizer-base:2.1.13
 
 COPY xos/synchronizer /opt/xos/synchronizers/kubernetes
 COPY VERSION /opt/xos/synchronizers/kubernetes/