4.0.0 cloud.opencode.base opencode-base-parent 1.0.5 opencode-base-region-data OpenCode Base Region Data Bundled latest-year China administrative division dataset (compact binary). Historical years are fetched on demand from GitHub Release attachments. JDK 25+ org.apache.maven.plugins maven-javadoc-plugin attach-javadocs true org.apache.maven.plugins maven-source-plugin attach-sources true