version 15.4.0

(cherry picked from commit bfd03f17924c8c512014cbfd00407f43b9c06c84)

README.md

@@ -1,4 +1,4 @@
-# elasticsearch.js 15.3.1
+# elasticsearch.js 15.4.0
 
 The official low-level Elasticsearch client for Node.js and the browser.
 

docs/browser_builds.asciidoc

@@ -22,7 +22,7 @@ npm install elasticsearch-browser
 ---------
 
 === Download
- * v15.3.1: https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.3.1.zip[zip], https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.3.1.tar.gz[tar.gz]
+ * v15.4.0: https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.4.0.zip[zip], https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.4.0.tar.gz[tar.gz]
 
 === Angular Build
   * Registers an `esFactory` factory in the `"elasticsearch"` module

docs/changelog.asciidoc

@@ -1,6 +1,9 @@
 [[changelog]]
 == Changelog
 
+=== 15.4.0 (Feb 6 2019)
+  * apiVersion `"6.6"` is now the default
+
 === 15.3.1 (Jan 23 2019)
   * Fixed an issue in node 10 where multi-byte characters in the URL would trigger and uncaught error https://github.com/elastic/elasticsearch-js/pull/756[#756]
 

package.json

@@ -7,7 +7,7 @@
   "description": "The official low-level Elasticsearch client for Node.js and the browser.",
   "main": "src/elasticsearch.js",
   "homepage": "http://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/index.html",
-  "version": "15.3.1",
+  "version": "15.4.0",
   "keywords": [
     "elasticsearch",
     "mapping",