Synch with changes plugin

the changes plugin is based on the file changes.xml.
It is a sequence of releases each covering the changes made in the current release.
The form is

```[xml]
<release version="0.0.4" date='2022-xx-xx' description=''>
...
</release>
```

I suggest, that the release plugin shall check whether

• the version is the version to be
• the date is the current date
• the description is not empty.

If all this is true, on can assume that the release element is maintained.
One should advise to start with empty version and empty date and empty description.