Bump asciidoctor-maven-plugin from 2.0.0 to 2.1.0
Bump asciidoctor-maven-plugin from 2.0.0 to 2.1.0

Bumps [asciidoctor-maven-plugin](https://github.com/asciidoctor/asciidoctor-maven-plugin) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/asciidoctor/asciidoctor-maven-plugin/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctor-maven-plugin/blob/master/CHANGELOG.adoc)
- [Commits](https://github.com/asciidoctor/asciidoctor-maven-plugin/compare/asciidoctor-maven-plugin-2.0.0...asciidoctor-maven-plugin-2.1.0)

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