change version

Author: Anh Dung Bui

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.dungba</groupId>
 	<artifactId>joo-promise4j</artifactId>
-	<version>1.5.1-SNAPSHOT</version>
+	<version>1.6.0-SNAPSHOT</version>
 	<packaging>jar</packaging>
 
 	<name>Promise4j</name>