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

pom.xml

@@ -3,7 +3,7 @@
 
 	<groupId>org.graylog2.repackaged</groupId>
 	<artifactId>grok</artifactId>
-	<version>0.1.9-graylog-3</version>
+	<version>0.1.9-graylog-4-SNAPSHOT</version>
 	<packaging>jar</packaging>
 	<name>Grok</name>
 	<description>Simple API that allows you to easily parse logs and other files</description>
@@ -32,7 +32,7 @@
 		<connection>scm:git:[email protected]:graylog-labs/java-grok.git</connection>
 		<developerConnection>scm:git:[email protected]:graylog-labs/java-grok.git</developerConnection>
 		<url>https://github.com/graylog-labs/java-grok</url>
-	  <tag>grok-0.1.9-graylog-3</tag>
+	  <tag>HEAD</tag>
   </scm>
 
 	<distributionManagement>