maven-checkstyle-plugin 2.1. to 2.3.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@794369 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

pom.xml

@@ -236,7 +236,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-checkstyle-plugin</artifactId>
-          <version>2.1</version>
+          <version>2.3</version>
           <configuration>
             <configLocation>${basedir}/checkstyle.xml</configLocation>
             <enableRulesSummary>false</enableRulesSummary>