Bump checkstyle from 10.3 to 10.3.1
Bump checkstyle from 10.3 to 10.3.1

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 10.3 to 10.3.1.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](https://github.com/checkstyle/checkstyle/compare/checkstyle-10.3...checkstyle-10.3.1)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
ethaneldridge/vassal,ethaneldridge/vassal,ethaneldridge/vassal