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

pom.xml

diff --git a/pom.xml b/pom.xml
index 60fdd34..24e1982 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
 
   <groupId>org.apache.geronimo</groupId>
   <artifactId>geronimo-jcache-simple</artifactId>
-  <version>1.0.2</version>
+  <version>1.0.3-SNAPSHOT</version>
   <name>Geronimo :: Simple JCache Implementation</name>
 
   <properties>
@@ -260,7 +260,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/geronimo-jcache-simple.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/geronimo-jcache-simple.git</developerConnection>
     <url>https://gitbox.apache.org/repos/asf/geronimo-jcache-simple.git</url>
-    <tag>geronimo-jcache-simple-1.0.2</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <organization>