scala update, part 1

pmd-scala/pom.xml

@@ -12,7 +12,7 @@
 
     <properties>
         <config.basedir>${basedir}/../pmd-core</config.basedir>
-        <scala.version>2.10.4</scala.version>
+        <scala.version>2.12.4</scala.version>
     </properties>
 
     <build>
@@ -21,7 +21,7 @@
                 <plugin>
                     <groupId>net.alchim31.maven</groupId>
                     <artifactId>scala-maven-plugin</artifactId>
-                    <version>3.2.0</version>
+                    <version>3.3.1</version>
                 </plugin>
             </plugins>
         </pluginManagement>
@@ -44,6 +44,7 @@
                     <jvmArgs>
                         <jvmArg>-Dscalac.patmat.analysisBudget=off</jvmArg>
                     </jvmArgs>
+                    <scalaVersion>${scala.version}</scalaVersion>
                 </configuration>
                 <executions>
                     <execution>

pom.xml

@@ -1056,5 +1056,6 @@ Additionally it includes CPD, the copy-paste-detector. CPD finds duplicated code
         <module>pmd-visualforce</module>
         <module>pmd-vm</module>
         <module>pmd-xml</module>
+        <module>pmd-scala</module>
     </modules>
 </project>