Fixed #138

 o Upgraded to maven-site-plugin 3.6
 o Upgraded maven-project-info-reports-plugin to 2.9
 o Upgraded maven-plugin-plugin to 3.5

pom.xml

@@ -14,7 +14,7 @@
   <name>Versions Maven Plugin</name>
   <url>http://www.mojohaus.org/versions-maven-plugin/</url>
   <description>
-    Versions Plugin for Maven 2. The Versions Plugin updates the versions of components in the POM.
+    Versions Plugin for Maven. The Versions Plugin updates the versions of components in the POM.
   </description>
   <inceptionYear>2008</inceptionYear>
   <licenses>
@@ -97,14 +97,13 @@
     <doxiaVersion>1.4</doxiaVersion>
     <doxia-sitetoolsVersion>1.4</doxia-sitetoolsVersion>
     <pluginVersion>${project.version}</pluginVersion>
-    <sitePluginVersion>3.3</sitePluginVersion>
   </properties>
 
   <dependencies>
     <dependency>
       <groupId>org.apache.maven.plugin-tools</groupId>
       <artifactId>maven-plugin-annotations</artifactId>
-      <version>3.4</version>
+      <version>3.5</version>
       <scope>provided</scope>
     </dependency>
 
@@ -295,14 +294,15 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.3</version>
+          <version>3.6</version>
         </plugin>
       </plugins>
     </pluginManagement>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-plugin-plugin</artifactId>
+        <version>3.5</version>
         <configuration>
           <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
         </configuration>
@@ -463,7 +463,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-project-info-reports-plugin</artifactId>
-        <version>2.7</version>
+        <version>2.9</version>
       </plugin>
     </plugins>
   </reporting>