update plexus-utils to 4.0.0
diff --git a/pom.xml b/pom.xml
index 574a2f5..b7910cd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -370,7 +370,12 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.5.1</version>
+      <version>4.0.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.codehaus.plexus</groupId>
+      <artifactId>plexus-xml</artifactId>
+      <version>4.0.0</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>