Update Checkstyle and PMD.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1578206 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

pom.xml

@@ -131,7 +131,7 @@ CSV files of various types.
         Use 2.9.1 instead of 2.10; 2.10 seems to scan the 'target' dir
         and wants license headers in .properties to be the header for Java files. 
     -->
-    <checkstyle.version>2.9.1</checkstyle.version>
+    <checkstyle.version>2.12</checkstyle.version>
     <checkstyle.header.file>${basedir}/LICENSE-header.txt</checkstyle.header.file>
   </properties>
 
@@ -194,7 +194,7 @@ CSV files of various types.
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-pmd-plugin</artifactId>
-        <version>3.0.1</version>
+        <version>3.1</version>
         <configuration>
           <targetJdk>${maven.compiler.target}</targetJdk>
         </configuration>