Why 0.4.0 version not present in repository?

```
dependencies {
    // ...
   compile 'org.grails.plugins:logback:0.4.0'
}
```

Fails with error:

```
Resolve error obtaining dependencies: Could not find artifact org.grails.plugins:grails-logback:jar:0.4.0 in grailsCentral (https://repo.grails.org/grails/plugins) (Use --stacktrace to see the full trace)
```

