Valid option `stubRun` labelled as unrecognized

Using a profile for stub runs the language server raises a warning saying that the option `stubRun` is unrecognized.

To reproduce
```bash
$ echo "profiles {
  stub {
    stubRun = true
  }
}
" > nextflow.config
```

Using to option this way does work however, so I think this is a bug in the language server.