Add typing for bools.

python/cudf/cudf/_lib/labeling.pyx

@@ -4,6 +4,7 @@ import numpy as np
 from enum import IntEnum
 
 from libc.stdint cimport uint32_t
+from libcpp.bool cimport bool as cbool
 from libcpp.memory cimport unique_ptr
 from libcpp.utility cimport move
 
@@ -19,8 +20,8 @@ from cudf._lib.cpp.column.column_view cimport column_view
 # Note that the parameter input shadows a Python built-in in the local scope,
 # but I'm not too concerned about that since there's no use-case for actual
 # input in this context.
-def label_bins(Column input, Column left_edges, left_inclusive,
-               Column right_edges, right_inclusive):
+def label_bins(Column input, Column left_edges, cbool left_inclusive,
+               Column right_edges, cbool right_inclusive):
     cdef inclusive c_left_inclusive = \
         inclusive.YES if left_inclusive else inclusive.NO
     cdef inclusive c_right_inclusive = \