The procedure has changed. Please, see this article instead: Compatibility check for custom bundles
Note about the "artifact version" used in the uploading command:
In the case of snapshot versions, it is not necessary to increase the version number. The newly uploaded bundle with the same artifact id and version will replace the old version. It means that you will see the new version in your package automatically BUT only in case where you tear the whole environment down first and then set it up again. It is not possible to UPGRADE to the newer bundle version which has the same version number as the old version.
On the other hand, in case of official release versions, it is recommended as the best practice to increase the version number. The new bundle should appear in your package automatically 10-15 minutes after the uploading process finished. Then you can use the UPGRADE feature, so it won't be necessary to tear down the whole environment.