Specify checkstyle version explicitly

Author: majst01

checkstyle.xml

@@ -27,6 +27,12 @@
     <property name="message" value="Space needed around ':' character."/>
   </module>
 
+  <!-- Checks for Size Violations.                    -->
+  <!-- See http://checkstyle.sf.net/config_sizes.html -->
+  <module name="LineLength">
+    <property name="max" value="120"/>
+  </module>
+
   <module name="TreeWalker">
     <!-- Checks for Javadoc comments.                     -->
     <!-- See http://checkstyle.sf.net/config_javadoc.html -->
@@ -59,17 +65,10 @@
       <property name="processJavadoc" value="true"/>
     </module>
 
-
-    <!-- Checks for Size Violations.                    -->
-    <!-- See http://checkstyle.sf.net/config_sizes.html -->
-    <module name="LineLength">
-      <property name="max" value="120"/>
-    </module>
     <module name="MethodLength">
       <property name="max" value="200"/>
     </module>
 
-
     <!-- Checks for whitespace                               -->
     <!-- See http://checkstyle.sf.net/config_whitespace.html -->
     <module name="GenericWhitespace"/>

pom.xml

@@ -211,7 +211,14 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>3.1.0</version>
+        <version>3.1.1</version>
+        <dependencies>
+          <dependency>
+            <groupId>com.puppycrawl.tools</groupId>
+            <artifactId>checkstyle</artifactId>
+            <version>8.39</version>
+          </dependency>
+        </dependencies>
         <configuration>
           <failsOnError>true</failsOnError>
           <configLocation>checkstyle.xml</configLocation>