Updates the changes.xml file in preparation for a release.
          Used by the scm:prepare-release goal.
        
| Attribute | Optional? | Description | 
|---|---|---|
| version | No | The version attribute of the release tag in changes.xml. | 
| encoding | Yes | The encoding of changes.xml file. If not given, the property maven.changes.outputencoding will be used. | 
| date | Yes | The date attribute of the release tag in changes.xml. If not given, the current date will be used. |