Deploying the ZIP to Maven Central is already available.
We are building such file already here with default name `junit-4.12-SNAPSHOT.zip`.

If you change the version like `<version>4.12-SNAPSHOT`</version> on the top of this file `pom.xml` to a release version, the ZIP file changes the name automatically.

In this point, I would remove FTP deployment in `pom.xml`.

Ok?