Update maven-checkstyle-plugin from 3.0.0 to 3.1.0.
diff --git a/conf/checkstyle.xml b/conf/checkstyle.xml
index 601210b..3fc1807 100644
--- a/conf/checkstyle.xml
+++ b/conf/checkstyle.xml
@@ -62,8 +62,6 @@
 
     <module name="TreeWalker">
 
-        <property name="cacheFile" value="${checkstyle.cache.file}"/>
-
         <!-- Checks for Javadoc comments.                     -->
         <!-- See http://checkstyle.sf.net/config_javadoc.html -->
         <module name="JavadocMethod">
diff --git a/pom.xml b/pom.xml
index 4cf3d26..f040bd3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -619,7 +619,7 @@
         <plugin>

           <groupId>org.apache.maven.plugins</groupId>

           <artifactId>maven-checkstyle-plugin</artifactId>

-          <version>3.0.0</version>

+          <version>3.1.0</version>

           <configuration>

             <configLocation>${basedir}/conf/checkstyle.xml</configLocation>

             <suppressionsLocation>${basedir}/conf/checkstyle-suppressions.xml</suppressionsLocation>

diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 5724ccc..b6d6a24 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -75,6 +75,9 @@
       <action dev="ggregory" type="fix" issue="CONFIGURATION-760" due-to="Gary Gregory">

         Properties file using cyclical includes cause a StackOverflowError instead of detecting the misconfiguration.

       </action>

+      <action dev="ggregory" type="update" due-to="Gary Gregory">

+        Update maven-checkstyle-plugin from 3.0.0 to 3.1.0. 

+      </action>

     </release>

     <release version="2.5" date="2019-05-23"

              description="Minor release with new features and updated dependencies.">