release version 1.6

Author: MartinDai

pom.xml

@@ -32,7 +32,7 @@
     </modules>
 
     <properties>
-        <revision>1.6-SNAPSHOT</revision>
+        <revision>1.6</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>