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

pom.xml

diff --git a/pom.xml b/pom.xml
index bba7e4c..604ab6f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
   </parent>
 
   <artifactId>org.apache.sling.scripting.java</artifactId>
-  <version>2.1.4</version>
+  <version>2.1.5-SNAPSHOT</version>
   <packaging>bundle</packaging>
 
   <name>Apache Sling Scripting Java Support</name>
@@ -39,7 +39,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-scripting-java.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-scripting-java.git</developerConnection>
     <url>https://gitbox.apache.org/repos/asf?p=sling-org-apache-sling-scripting-java.git</url>
-    <tag>org.apache.sling.scripting.java-2.1.4</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <build>