prepare for 5.2.2-beta3

build.sh

 #!/bin/bash
 PLUGIN_NAME=searchguard-kibana
-PLUGIN_VERSION=5.3.0-beta3
-KIBANA_VERSION=5.3.0
+PLUGIN_VERSION=5.2.2-beta3
+KIBANA_VERSION=5.2.2
 echo "Building $PLUGIN_NAME-$PLUGIN_VERSION.zip"
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..

package.json

 {
   "name": "searchguard",
-  "version": "5.3.0",
+  "version": "5.2.2",
   "description": "Search Guard features for kibana",
   "main": "index.js",
   "homepage": "https://floragunn.com",