[maven-release-plugin] prepare release sketches-core-0.2.1

pom.xml

@@ -3,14 +3,12 @@
      Licensed under the terms of the Apache License 2.0. 
      See LICENSE file at the project root for terms. -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" 
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>com.yahoo.datasketches</groupId>
   <artifactId>sketches-core</artifactId>
-  <version>0.2.1-SNAPSHOT</version>
+  <version>0.2.1</version>
 
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Data Sketches Core</description>
@@ -41,7 +39,7 @@
     <connection>scm:git:ssh://[email protected]/DataSketches/sketches-core.git</connection>
     <developerConnection>scm:git:ssh://[email protected]/DataSketches/sketches-core.git</developerConnection>
     <url>https://github.com/DataSketches/sketches-core.git</url>
-    <tag>HEAD</tag>
+    <tag>sketches-core-0.2.1</tag>
   </scm>
 
   <properties>