update Xtext version for the new release

Author: ipa-nhg

plugins/de.fraunhofer.ipa.ros.parent/pom.xml

@@ -8,7 +8,7 @@
 	<packaging>pom</packaging>
 
 	<properties>
-		<xtextVersion>2.16.0</xtextVersion>
+		<xtextVersion>2.25.0</xtextVersion>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<maven.compiler.source>1.8</maven.compiler.source>
 		<maven.compiler.target>1.8</maven.compiler.target>