This datasource finds SBT package updates from Maven repositories.

By default, Renovate checks `https://repo.maven.apache.org/maven2` for SBT packages.
You can override the default behavior with the `registryUrls` config option.
For example:

```json
{
  "packageRules": [
    {
      "matchDatasources": ["sbt-package"],
      "registryUrls": [
        "https://repo.maven.apache.org/maven2",
        "https://oss.sonatype.org/content/repositories/snapshots"
      ]
    }
  ]
}
```