[maven-release-plugin] prepare release v0.9.0

pom.xml

@@ -1,16 +1,16 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<groupId>org.rascalmpl</groupId>
 	<artifactId>rascal</artifactId>
-	<version>0.8.4-SNAPSHOT</version>
+	<version>0.9.0</version>
 
 	<packaging>jar</packaging>
 
 	<scm>
 		<developerConnection>scm:git:ssh://[email protected]/usethesource/rascal.git</developerConnection>
-	</scm>
+	  <tag>v0.9.0</tag>
+  </scm>
 
 	<!-- deployment configuration (usethesource) -->
 	<distributionManagement>
@@ -317,7 +317,7 @@
 										</goals>
 									</pluginExecutionFilter>
 									<action>
-										<ignore></ignore>
+										<ignore />
 									</action>
 								</pluginExecution>
 							</pluginExecutions>