[maven-release-plugin] prepare release 0.2.1

Author: Adrian Cole

pom.xml

@@ -14,14 +14,12 @@
     the License.
 
 -->
-<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/xsd/maven-4.0.0.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/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>io.zipkin.proto3</groupId>
   <artifactId>zipkin-proto3</artifactId>
-  <version>0.2.2-SNAPSHOT</version>
+  <version>0.2.1</version>
   <packaging>jar</packaging>
 
   <name>zipkin-proto3</name>
@@ -63,7 +61,7 @@
     <url>https://github.com/openzipkin/zipkin-api</url>
     <connection>scm:git:https://github.com/openzipkin/zipkin-api.git</connection>
     <developerConnection>scm:git:https://github.com/openzipkin/zipkin-api.git</developerConnection>
-    <tag>HEAD</tag>
+    <tag>0.2.1</tag>
   </scm>
 
   <!-- Developer section is needed for Maven Central, but doesn't need to include each person -->