Log Message:
py-astroid: updated to 1.6.2

1.6.2
* Fix submodule imports from six
* Enhancement of brain_numpy by adding different types from
  numpy.core.numerictypes
* Fix RecursionError for augmented assign
* Stop most inference tip overwrites from happening by using
  predicates on existing inference_tip transforms.
* Add missing attrs special attribute
* Fix contextlib.contextmanager inference for nested context managers