Prepare for next release. Set dependency to 0.3.0.
diff --git a/pom.xml b/pom.xml
index 822f325..f4ee05f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -55,7 +55,7 @@
     <dependency>
       <groupId>com.yahoo.datasketches</groupId>
       <artifactId>sketches-core</artifactId>
-      <version>0.2.2</version>
+      <version>0.3.0</version>
     </dependency>
 
     <!-- hadoop -->