Bump version to 1.6.0
diff --git a/gradle.properties b/gradle.properties
index 05d1749..a273699 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -16,7 +16,7 @@
 # under the License.
 
 group=org.apache.datafu
-version=1.5.0
+version=1.6.0
 gradleVersion=4.8.1
 org.gradle.jvmargs="-XX:MaxPermSize=512m"
 scalaVersion=2.11