update es to 6.2.4 (#545)

Author: zj0713001

README.md

@@ -3,15 +3,15 @@ IK Analysis for Elasticsearch
 
 The IK Analysis plugin integrates Lucene IK analyzer (http://code.google.com/p/ik-analyzer/) into elasticsearch, support customized dictionary.
 
-Analyzer: `ik_smart` , `ik_max_word` , Tokenizer: `ik_smart` , `ik_max_word` 
+Analyzer: `ik_smart` , `ik_max_word` , Tokenizer: `ik_smart` , `ik_max_word`
 
 Versions
 --------
 
 IK version | ES version
 -----------|-----------
 master | 6.x -> master
-6.2.3| 6.2.3
+6.2.4| 6.2.4
 6.1.3| 6.1.3
 5.6.8| 5.6.8
 5.5.3| 5.5.3
@@ -35,7 +35,7 @@ Install
 1.download or compile
 
 * optional 1 - download pre-build package from here: https://github.com/medcl/elasticsearch-analysis-ik/releases
-    
+
     unzip plugin to folder `your-es-root/plugins/`
 
 * optional 2 - use elasticsearch-plugin to install ( supported from version v5.5.1 ):
@@ -70,7 +70,7 @@ curl -XPOST http://localhost:9200/index/fulltext/_mapping -H 'Content-Type:appli
                 "search_analyzer": "ik_max_word"
             }
         }
-    
+
 }'
 ```
 

pom.xml

@@ -12,7 +12,7 @@
     <inceptionYear>2011</inceptionYear>
 
     <properties>
-        <elasticsearch.version>6.2.3</elasticsearch.version>
+        <elasticsearch.version>6.2.4</elasticsearch.version>
         <maven.compiler.target>1.8</maven.compiler.target>
         <elasticsearch.assembly.descriptor>${project.basedir}/src/main/assemblies/plugin.xml</elasticsearch.assembly.descriptor>
         <elasticsearch.plugin.name>analysis-ik</elasticsearch.plugin.name>
@@ -21,7 +21,7 @@
         <tests.rest.load_packaged>false</tests.rest.load_packaged>
         <skip.unit.tests>true</skip.unit.tests>
         <gpg.keyname>4E899B30</gpg.keyname>
-        <gpg.useagent>true</gpg.useagent> 
+        <gpg.useagent>true</gpg.useagent>
     </properties>
 
     <licenses>