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

pom.xml

@@ -5,7 +5,7 @@
 	<groupId>com.messners</groupId>
 	<artifactId>gitlab-api</artifactId>
 	<packaging>jar</packaging>
-	<version>4.0.4</version>
+	<version>4.0.5-SNAPSHOT</version>
 	<name>GitLab API Java Client</name>
 	<description>GitLab API provides a full featured Java API for working with GitLab repositories via the GitLab REST API</description>
 	<url>http://www.messners.com/#gitlab-api/gitlab-api.html</url>
@@ -50,7 +50,7 @@
 		<url>git@github.com:gmessner/gitlab-api.git</url>
 		<connection>scm:git:git@github.com:gmessner/gitlab-api.git</connection>
 		<developerConnection>scm:git:git@github.com:gmessner/gitlab-api.git</developerConnection>
-		<tag>gitlab-api-4.0.4</tag>
+		<tag>HEAD</tag>
 	</scm>
 
 	<build>