[MJAVADOC-817] Upgrade to Doxia 2.0.0 GA Stack

This closes #330

pom.xml

@@ -112,7 +112,7 @@ under the License.
   <properties>
     <javaVersion>8</javaVersion>
     <mavenVersion>3.6.3</mavenVersion>
-    <doxiaSitetoolsVersion>2.0.0-M19</doxiaSitetoolsVersion>
+    <doxiaSitetoolsVersion>2.0.0</doxiaSitetoolsVersion>
     <wagonVersion>3.5.3</wagonVersion>
     <resolverVersion>1.4.1</resolverVersion>
     <!-- https://cwiki.apache.org/confluence/x/VIHOCg#MavenEcosystemCleanup-ResolverandMaven -->
@@ -123,7 +123,7 @@ under the License.
     <compilerPluginVersion>3.11.0</compilerPluginVersion>
     <sourcePluginVersion>3.3.0</sourcePluginVersion>
     <enforcerPluginVersion>3.4.1</enforcerPluginVersion>
-    <pluginPluginVersion>3.14.0</pluginPluginVersion>
+    <pluginPluginVersion>3.15.0</pluginPluginVersion>
     <jarPluginVersion>3.3.0</jarPluginVersion>
     <sitePluginVersion>3.20.0</sitePluginVersion>
     <projectInfoReportsPluginVersion>3.7.0</projectInfoReportsPluginVersion>
@@ -201,13 +201,13 @@ under the License.
     <dependency>
       <groupId>org.apache.maven.reporting</groupId>
       <artifactId>maven-reporting-api</artifactId>
-      <version>4.0.0-M12</version>
+      <version>4.0.0</version>
     </dependency>
     <!-- for Javadoc purposes -->
     <dependency>
       <groupId>org.apache.maven.reporting</groupId>
       <artifactId>maven-reporting-impl</artifactId>
-      <version>4.0.0-M15</version>
+      <version>4.0.0</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
@@ -235,7 +235,7 @@ under the License.
     <dependency>
       <groupId>org.apache.maven.doxia</groupId>
       <artifactId>doxia-sink-api</artifactId>
-      <version>2.0.0-M12</version>
+      <version>2.0.0</version>
     </dependency>
 
     <!-- Doxia-sitetools -->