Update checkstyle to 8.29

See GHSA-763g-fqq7-48wg

Note: this also requires a new pmd-build-tools with
an updated checkstyle configuration

Author: adangel

pom.xml

@@ -22,8 +22,8 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <pmd.version>6.21.0</pmd.version>
     <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
-    <pmd.build-tools.version>3</pmd.build-tools.version>
-    <checkstyle.version>3.0.0</checkstyle.version>
+    <pmd.build-tools.version>6-SNAPSHOT</pmd.build-tools.version>
+    <checkstyle.version>3.1.0</checkstyle.version>
 
     <updatesite.orbit>http://download.eclipse.org/tools/orbit/downloads/drops/${orbit.version}/repository/</updatesite.orbit>
   </properties>
@@ -206,7 +206,7 @@
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>
               <artifactId>checkstyle</artifactId>
-              <version>8.18</version>
+              <version>8.29</version>
             </dependency>
             <dependency>
               <groupId>net.sourceforge.pmd</groupId>