Bump checkstyle from 6.19 to 8.29

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 6.19 to 8.29.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-6.19...checkstyle-8.29)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -229,7 +229,7 @@
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>
               <artifactId>checkstyle</artifactId>
-              <version>6.19</version>
+              <version>8.29</version>
             </dependency>
           </dependencies>
         </plugin>