Ruby bindings not working when searching contacts collection

Hi,

We are using the ruby bindings from the official repo here and there are a few examples on how to search for contacts, for instance:

# Search for contacts by email
contacts = intercom.contacts.search(
  "query": {
    "field": 'email',
    "operator": '=',
    "value": 'some_contact@example.com'
  }
)
contacts.each {|c| p c.email}
# For full detail on possible queries, please refer to the API documentation:
# https://developers.intercom.com/intercom-api-reference/reference

When trying to access the resulting collection I always get a Resource Not Found (Intercom::ResourceNotFound) error. 

Doing this same search for the same contact with cURL or with the ruby net/http client works fine and returns the contact.

Is the search in the ruby gem broken?