[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -2,7 +2,7 @@
 <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>
   <artifactId>core.rrb-vector</artifactId>
-  <version>0.2.0</version>
+  <version>0.2.1-SNAPSHOT</version>
   <name>core.rrb-vector</name>
   <description>RRB-Trees for Clojure(Script) -- see Bagwell &amp; Rompf</description>
 
@@ -31,7 +31,7 @@
     <connection>scm:git:git://github.com/clojure/core.rrb-vector.git</connection>
     <developerConnection>scm:git:git://github.com/clojure/core.rrb-vector.git</developerConnection>
     <url>https://github.com/clojure/core.rrb-vector</url>
-    <tag>v0.2.0</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <properties>