checkstyle.version 2.12.1 -> 2.13.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1635047 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

pom.xml

@@ -126,7 +126,7 @@ CSV files of various types.
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <commons.encoding>UTF-8</commons.encoding>
 
-    <checkstyle.version>2.12.1</checkstyle.version>
+    <checkstyle.version>2.13</checkstyle.version>
     <checkstyle.header.file>${basedir}/LICENSE-header.txt</checkstyle.header.file>
 
     <!-- Override jacoco version from commons parent 34, since it doesn't work with Java 8.