Add missing direct dependency Plexus Utils

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1781713 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 174f1bf..0402b89 100644
--- a/pom.xml
+++ b/pom.xml
@@ -122,6 +122,11 @@
       <artifactId>maven-plugin-annotations</artifactId>
       <scope>provided</scope>
     </dependency>
+    <dependency>
+      <groupId>org.codehaus.plexus</groupId>
+      <artifactId>plexus-utils</artifactId>
+      <version>3.0.24</version>
+    </dependency>
 
     <!-- test -->
     <dependency>