[GH-1] Support `functools.partial`. Partial function is a class in python 3.5 and later. Check partial function type in the `is_function` predicator. Bump verstion to 0.1.9.
[GH-1] Support `functools.partial`. Partial function is a class in python 3.5 and later. Check partial function type in the `is_function` predicator. Bump verstion to 0.1.9.