LNT: Ignore return value mypy error

[snowman2]

This is the error:

python -m mypy geocube
geocube/rasterize.py:26: error: Incompatible return value type (got "numpy.bool[builtins.bool]", expected "builtins.bool")  [return-value]

The function is using the builtin issubclass method internally.

>>> import numpy
>>> res = numpy.issubdtype("int32", numpy.number)
>>> res
True
>>> type(res)
<class 'bool'>
>>> numpy.bool_(False)
np.False_
>>> type(numpy.bool_(False))
<class 'numpy.bool'>