update maven-plugin-plugin to 3.2

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1408564 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index eeb9f45..8a28faa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -67,7 +67,7 @@
     <doxiaSitetoolsVersion>1.2</doxiaSitetoolsVersion>
     <mavenVersion>2.2.1</mavenVersion>
     <sitePluginVersion>3.1</sitePluginVersion>
-    <mavenPluginPluginVersion>3.1</mavenPluginPluginVersion>
+    <mavenPluginPluginVersion>3.2</mavenPluginPluginVersion>
   </properties>
 
   <dependencies>