Custom tags

I've looked through previous issues as well as the docs, but I can't find anything related to custom tags.

I've had a go at passing through a `jsdoc.json` config file to the linter but it does not seem as though it reads JSDoc configuration.

```js
/**
* @namespace humdidum
* @ngInject
*/
export default ($eek, $stringBasedDI) => {
// redacted
}
```

The linter will correctly identify `ngInject` and call it out for being an unknown JSDoc tag.