`scrubFields` config doesn't support paths (e.g. request.session.myKey)?

Surely I must be doing something wrong, but it seems like scrubFields doesn't properly deal with paths (e.g. request.session.myKey).

I'm using v1.8.1 and have checked what happens in Scrubber::scrubArray:114. $fields is the scrubFields array from the configuration literal, which includes paths (e.g. request.session.myKey). $key, on the other hand, is always only the last part (e.g. myKey).

It looks like the code should check isset($fields[strtolower($current)]) as well as isset($fields[strtolower($key)]) maybe?

As an example:

Rollbar::init([
  'scrubFields' => [
    'request.session.myKey'
  ]
]);

Does not scrub myKey, while

Rollbar::init([
  'scrubFields' => [
    'myKey'
  ]
]);

does.

The documentation actually lists a couple of path values in the defaults (e.g. request.session.csrf_), so I fully expect this to work.