[Security] Bump checkstyle from 8.27 to 8.29

[dependabot-preview]

Bumps checkstyle from 8.27 to 8.29.

Release notes

Sourced from checkstyle's releases.

checkstyle-8.29

https://checkstyle.org/releasenotes.html#Release_8.29

checkstyle-8.28

https://checkstyle.org/releasenotes.html#Release_8.28

Commits

• 8933d03 [maven-release-plugin] prepare release checkstyle-8.29
• bd45909 Issue #7487: refactor code to use DetailAST.hasChildren()
• 317e51f Issue #7487: add method hasChildren() to DetailAST
• 89b4dcd Issue #3238: Java 8 Grammar: annotations on arrays and varargs
• 252cd89 dependency: bump junit-pioneer from 0.5.1 to 0.5.2
• 2ee2615 dependency: bump junit.version from 5.5.2 to 5.6.0
• 4ed7cb8 minor: add space before xml comment end '-->' to ease reading and make links ...
• c46a16d Issue #7468: disable 'external-parameter-entities' feature by default
• dfed794 minor: add missing test case to SuperCloneCheckTest
• 24e7bdf dependency: bump antlr4.version from 4.7.2 to 4.8-1
• Additional commits viewable in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects com.puppycrawl.tools:checkstyle
Due to an incomplete fix for CVE-2019-9658, checkstyle was still vulnerable to XML External Entity (XXE) Processing.

Impact

User: Build Maintainers

This vulnerability probably doesn't impact Maven/Gradle users as, in most cases, these builds are processing files that are trusted, or pre-vetted by a pull request reviewer before being run on internal CI infrastructure.

User: Static Analysis as a Service

... (truncated)

Affected versions: ["< 8.29"]