How to use spike-records with pug-static-loader?

The method written in spike-records fails:
```
test: /\.pug$/,
      use: [{
        loader: 'pug-static-loader',
        options: {
          pretty: true,
          locals: () => locals
        }
      }]
```

Error:
```
ModuleBuildError: Module build failed: ValidationError: child "locals" fails because ["locals" must be an object]
```