get_entity_groups_by_type() returns always none

[jaimef1603]

missing "return" in https://github.com/thingsboard/python_tb_rest_client/blob/89faedd08e151c2736506159109cc31fa785e9c2/tb_rest_client/rest_client_pe.py#L182

[imbeacon]

Hi @jaimef1603

Thank you for your feedback, we have fixed it in 506272c .