Use ES 5.6.16

Author: delvedor

.ci/test-matrix.yml

@@ -1,6 +1,6 @@
 ---
 ELASTICSEARCH_VERSION:
-- 5.6.15
+- 5.6.16
 
 NODE_JS_VERSION:
 - 11

.travis.yml

@@ -11,7 +11,7 @@ node_js:
 
 env:
   global:
-    - ELASTICSEARCH_VERSION=5.6.15
+    - ELASTICSEARCH_VERSION=5.6.16
     - QUIET=true
 
 before_install:

scripts/es-docker-platinum.sh

@@ -28,4 +28,4 @@ exec docker run \
   -v "$repo$testnodekey:/usr/share/elasticsearch/config/certs/testnode.key" \
   -v "$repo$cacrt:/usr/share/elasticsearch/config/certs/ca.crt" \
   -p 9200:9200 \
-  docker.elastic.co/elasticsearch/elasticsearch:5.6.15
+  docker.elastic.co/elasticsearch/elasticsearch:5.6.16

scripts/es-docker.sh

@@ -12,4 +12,4 @@ exec docker run \
   -p 9200:9200 \
   --network=elastic \
   --name=elasticsearch \
-  docker.elastic.co/elasticsearch/elasticsearch:5.6.15
+  docker.elastic.co/elasticsearch/elasticsearch:5.6.16