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

pom.xml

diff --git a/pom.xml b/pom.xml
index 6f10d96..4432c60 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
     </parent>
 
     <artifactId>velocity-engine-parent</artifactId>
-    <version>2.3</version>
+    <version>2.4-SNAPSHOT</version>
 
     <name>Apache Velocity</name>
     <url>http://velocity.apache.org/engine/devel/</url>
@@ -222,7 +222,7 @@
         <connection>scm:git:https://gitbox.apache.org/repos/asf/velocity-engine.git</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/velocity-engine.git</developerConnection>
         <url>https://gitbox.apache.org/repos/asf?p=velocity-engine.git</url>
-        <tag>2.3-RC1</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <issueManagement>

spring-velocity-support/pom.xml

diff --git a/spring-velocity-support/pom.xml b/spring-velocity-support/pom.xml
index 2a39811..f8e3fbc 100644
--- a/spring-velocity-support/pom.xml
+++ b/spring-velocity-support/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-parent</artifactId>
-        <version>2.3</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
     <artifactId>spring-velocity-support</artifactId>
     <name>Spring framework Velocity support</name>

velocity-custom-parser-example/pom.xml

diff --git a/velocity-custom-parser-example/pom.xml b/velocity-custom-parser-example/pom.xml
index 49f712b..72c6ab7 100644
--- a/velocity-custom-parser-example/pom.xml
+++ b/velocity-custom-parser-example/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-parent</artifactId>
-        <version>2.3</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>velocity-custom-parser-example</artifactId>

velocity-engine-core/pom.xml

diff --git a/velocity-engine-core/pom.xml b/velocity-engine-core/pom.xml
index 8dac9d0..bec9c9a 100644
--- a/velocity-engine-core/pom.xml
+++ b/velocity-engine-core/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-parent</artifactId>
-        <version>2.3</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>velocity-engine-core</artifactId>

velocity-engine-examples/pom.xml

diff --git a/velocity-engine-examples/pom.xml b/velocity-engine-examples/pom.xml
index cbb67f4..cff0413 100644
--- a/velocity-engine-examples/pom.xml
+++ b/velocity-engine-examples/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-parent</artifactId>
-        <version>2.3</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
     
     <artifactId>velocity-engine-examples</artifactId>

velocity-engine-scripting/pom.xml

diff --git a/velocity-engine-scripting/pom.xml b/velocity-engine-scripting/pom.xml
index da39d73..1c6eaf9 100644
--- a/velocity-engine-scripting/pom.xml
+++ b/velocity-engine-scripting/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-parent</artifactId>
-        <version>2.3</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
     <artifactId>velocity-engine-scripting</artifactId>
     <name>Apache Velocity - JSR 223 Scripting</name>