Path property of error remains empty even if custom function provides some value

[johannesmarx]

Describe the bug
The path property of the error is not handled correctly when writing custom functions. In case the function also provides some value for the path besides the message, it remains empty after calling new Spectral(resolver).run(openApi).

To Reproduce

1. Given a custom most simplified function:

export default (targetValue) => {
  return [
   {
      message: "Some issue with servers",
      path: ['servers'],
   },
  ];
};

2. The linting result will be:

[
  {
    code: 'my-check',
    message: 'Some issue with servers',
    path: [],
    ...
  }
]

Expected behavior
The expected result would also contain the path provided by the custom function as follows:

[
  {
    code: 'my-check',
    message: 'Some issue with servers',
    path: ['servers'],
    ...
  }

Environment (remove any that are not applicable):

• Library version:
  • stoplight/spectral-cli: 6.11.0
  • stoplight/spectral-ruleset-bundler: 1.5.2