Maven Site: Make it really working with Maven 3

pom.xml

@@ -73,12 +73,12 @@
             <extension>
                 <groupId>org.apache.maven.scm</groupId>
                 <artifactId>maven-scm-provider-gitexe</artifactId>
-                <version>1.3</version>
+                <version>1.9.5</version>
             </extension>
             <extension>
                 <groupId>org.apache.maven.scm</groupId>
                 <artifactId>maven-scm-manager-plexus</artifactId>
-                <version>1.3</version>
+                <version>1.9.5</version>
             </extension>
             <extension>
                 <groupId>org.kathrynhuxtable.maven.wagon</groupId>
@@ -87,34 +87,35 @@
             </extension>
         </extensions>
         <plugins>
-            <plugin>
-                <artifactId>maven-site-plugin</artifactId>
-                <version>2.1.1</version>
-            </plugin>
+          <plugin>
+            <artifactId>maven-site-plugin</artifactId>
+            <version>3.6</version>
+          </plugin>
         </plugins>
+
     </build>
 
     <reporting>
         <plugins>
             <plugin>
                 <artifactId>maven-changelog-plugin</artifactId>
-                <version>2.2</version>
+                <version>2.3</version>
             </plugin>
             <plugin>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>2.6</version>
+                <version>2.17</version>
             </plugin>
             <plugin>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.2</version>
+                <version>2.5</version>
             </plugin>
             <plugin>
                 <artifactId>maven-pmd-plugin</artifactId>
-                <version>2.5</version>
+                <version>3.8</version>
             </plugin>
             <plugin>
                 <artifactId>maven-project-info-reports-plugin</artifactId>
-                <version>2.3.1</version>
+                <version>2.9</version>
                 <reportSets>
                     <reportSet>
                         <reports>
@@ -133,18 +134,19 @@
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
+                <!-- TODO: Pick 2.7+ once MCOBERTURA-203 is fixed -->
                 <artifactId>cobertura-maven-plugin</artifactId>
-                <version>2.4</version>
+                <version>2.6</version>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>javancss-maven-plugin</artifactId>
-                <version>2.0</version>
+                <version>2.1</version>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>jdepend-maven-plugin</artifactId>
-                <version>2.0-beta-2</version>
+                <version>2.0</version>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>