Latest version of com.google.protobuf:protoc
https://javadoc.io/doc/com.google.protobuf/protoc
Current version 3.21.4
https://javadoc.io/doc/com.google.protobuf/protoc/3.21.4
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/com.google.protobuf/protoc/3.21.4/package-list