[MCOMPILER-526] Upgrade to parent 39

Author: gnodet

pom.xml

@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-plugins</artifactId>
-    <version>37</version>
+    <version>39</version>
     <relativePath />
   </parent>
 
@@ -215,6 +215,17 @@ under the License.
         <groupId>org.eclipse.sisu</groupId>
         <artifactId>sisu-maven-plugin</artifactId>
       </plugin>
+      <plugin>
+        <groupId>com.diffplug.spotless</groupId>
+        <artifactId>spotless-maven-plugin</artifactId>
+        <configuration>
+          <java>
+            <includes>
+              <include>src/**/*.java</include>
+            </includes>
+          </java>
+        </configuration>
+      </plugin>
     </plugins>
   </build>