Bump central-publishing-maven-plugin to 0.12.0
The 0.2.13 publish failed Central's validation: "Bundle has content that does NOT have a .pom file". Maven 3.10 on the runner leaves maven-metadata-local.xml and _remote.repositories in the staging directory, and plugin 0.11.0 bundles them. 0.12.0 deletes them first; locally its bundle under Maven 3.10 has the same 12 files as under 3.9. Merging this publishes 0.2.13.
Summary by cubic
Bumps central-publishing-maven-plugin to 0.12.0 to fix the failed Central validation of the 0.2.13 publish.
Under Maven 3.10, plugin 0.11.0 bundled maven-metadata-local.xml and _remote.repositories into the staging directory, and Central rejected the bundle because it lacked a .pom file. Plugin 0.12.0 deletes those files before bundling, so the resulting bundle matches the one produced under Maven 3.9. Merging this allows the 0.2.13 release to be published.